[[Graphics::2d]]

Azimuth: Azimuth is a top-down shooter adventure game where you play as a ship and explore through a large map, shooting and dodging a wide variety of enemies, solving environmental puzzles and progress through the story.

Besssugo: besssugo is a free computational tool specifically designed to aid a cognizant expert—i.e. you, whether an engineer, scientist, technician, geek, etc—to build videos showing the result of a certain scientific calculation or whatever data can be computed or storied in a digital computer. Technically speaking, it is a plugin for the computational tool wasora, which provides means to parse and understand a high-level plain-text input file containing algebraic expressions, data for function interpolation, differential equations and output instructions amongst other facilities. Therefore, any mathematical computation which can be done by wasora—i.e. solving systems of differential-algebraic equations, multidimensional interpolation of scattered data, numerical integration and differentiation, etc.—can be combined with the facilities that besssugo provides to create visual representations in the form of animations.

Biggles: Biggles is a Python module for the creation of publication-quality 2D scientific plots. Its features include an elegant, high-level interface, a simple TeX interpreter, and postscript, png, gif, svg, and x11 output formats.

Birdfont: Birdfont is a font editor which lets you create vector graphics and export TTF, EOT and SVG fonts. https://github.com/johanmattssonm/birdfont

Bloom: Oliver the Robot had lived in a world of metal his entire life. But then, one day, a bird flew overhead and dropped a brightly colored flowered right next to Oliver. He had never seen something so pretty! His metallic heart was set on finding more, and bringing color into his formerly grey life. Bloom's main mechanic is something you've probably never seen in a platformer. Instead of avoiding dying and respawning, respawning is actually critical to pass many of the levels! When Oliver the Robot touches heat his body will break, and he'll need to get a new one. However, his old robot body will stay where it was broken, allowing you to use it as a platform! This can be used to scale tall walls, make previously impossible jumps, or to block certain paths! Lovable Character: The protagonist of the game is a robot named Oliver. A lot of attention was put into developing the story, levels, and mechanics around Oliver to make him a lovable character! Creative Game Mechanics In most platformers, the goal is to avoid dying as much as possible. Bloom, on the other hand, uses respawns as a mechanic to complete levels! When you respawn, Oliver's old robot body stays in place, allowing you to use it to complete the level. Easy To Learn: The game mechanics of Bloom are quick and easy to learn. Everything you need to know is introduced by a tutorial level in under 60 seconds! Completely Original: All the assets used by Bloom are completely original, and made specifically for the project. Cross Platform: Bloom runs on both Mac and GNU/Linux, allowing for more players to give it a try! Open And DRM Free: Bloom is completely free software, and has absolutely no DRM. You can freely share it with anyone you want, as long as you follow the extremely non-restrictive license! Unique Story: The story-line of Bloom is simple enough to not overwhelm the game itself, while still being creative enough to be intriguing. Lightweight: Bloom doesn't require high end hardware to run well. Even inexpensive computers should be able to run the game at a full 60 frames per second without issue.

Brother ql: brother_ql is a software package to facilitate printing labels on Brother’s QL-Series label printers. It was designed to be used from the command line but also supports usage from other software packages (via its command line interface or via its Python API).

CGAL: The goal of the CGAL Project is to provide easy access to efficient and reliable geometric algorithms in the form of a C++ library. CGAL is used in various areas needing geometric computation, such as: computer graphics, scientific visualization, computer aided design and modeling, geographic information systems, molecular biology, medical imaging, robotics and motion planning, mesh generation, numerical methods...
CGAL offers data structures and algorithms like triangulations (2D constrained triangulations and Delaunay triangulations in 2D and 3D), Voronoi diagrams (for 2D and 3D points, 2D additively weighted Voronoi diagrams, and segment Voronoi diagrams), Boolean operations on polygons and polyhedra, arrangements of curves and their applications (2D and 3D envelopes, Minkowski sums) mesh generation (2D Delaunay mesh generation and 3D surface mesh generation, skin surfaces), geometry processing (surface mesh simplification, subdivision and parameterization, as well as estimation of local differential properties, and approximation of ridges and umbilics), alpha shapes, convex hull algorithms (in 2D, 3D and dD), operations on polygons (straight skeleton and offset polygon), search structures (kd trees for nearest neighbor search, and range and segment trees), interpolation (natural neighbor interpolation and placement of streamlines), shape analysis, fitting, and distances (smallest enclosing sphere of points or spheres, smallest enclosing ellipsoid of points, principal component analysis), and kinetic data structures. All these data structures and algorithms operate on geometric objects like points and segments, and perform geometric tests on them. These objects and predicates are regrouped in CGAL Kernels.

Cairo: Cairo is a 2D graphics library with support for multiple output devices. Currently supported output targets include the X Window System (via both Xlib and XCB), Quartz, Win32, image buffers, PostScript, PDF, and SVG file output. Experimental backends include OpenGL, BeOS, OS/2, and DirectFB. Cairo is designed to produce consistent output on all output media while taking advantage of display hardware acceleration when available (eg. through the X Render Extension). The cairo API provides operations similar to the drawing operators of PostScript and PDF. Operations in cairo including stroking and filling cubic Bézier splines, transforming and compositing translucent images, and antialiased text rendering. All drawing operations can be transformed by any affine transformation (scale, rotation, shear, etc.) Cairo is implemented as a library written in the C programming language, but bindings are available for several different programming languages.

Carom: Super fun carom board game.

Castle Game Engine: Castle Game Engine is a cross-platform 3D and 2D game engine for Object Pascal (FPC and Lazarus). - It supports many formats for game assets, including X3D, VRML, Collada, Spine JSON, MD3 and others. - Many graphic effects are possible, including bump mapping, shadows, shaders, mirrors, screen effects. - Animation, collision detection, 3D sound and more features are available. - An extensible system of 3D objects can be used, with out-of-the-box levels, items, intelligent creatures and more. - The engine is portable -- for desktop, mobile, web plugin. The engine is also used to develop view3dscene - a full-featured X3D / VRML browser and a viewer for many other 3D and 2D game formats.

Cl-ana

cl-ana is a library of modular utilities for reasonably high performance data analysis & visualization using Common Lisp. (Reasonably means I have to be able to use it for analyzing particle accelerator data). The library is made of various sublibraries and is designed in a very bottom-up way so that if you don't care about some feature you don't have to load it. The functionality support so far are

Tabular data analysis: Read-write of large datasets stored in HDF5 files are supported, along with ntuple datasets, CSVs, and in-memory data tables. Users can add their own table types by defining 4 methods and extending the table CLOS type.

Histograms: Binned data analysis is supported with both contiguous and sparse histogram types; functional interface is provided via map (which allows reduce/fold) and filter.

Plotting: Uses gnuplot for plotting dataset samples, plain-old lisp functions, histograms, strings-as-formulae, and anything else the user wishes to add via methods on a couple of generics.

Fitting: Uses GSL for non-linear least squares fitting. Uses plain-old lisp functions as the fit functions and can fit against dataset samples, histograms, and whatever the user adds.

Generic mathematics: CL doesn't provide extendable math functions, so cl-ana provides these as well as a convenient mechanism (a single function) for using these functions instead of the non-extendable versions. Already included are error propogation and quantities (values with units, e.g. 5 meters) as well as a GNU Octave-style handling of sequences (e.g. (+ (1 2) (3 4)) --> (4 6)).

Collab: Multiplatform raster graphical editor enabling simultaneous drawing between users. Project including several sub projects as server, painting framework, network library, desktop application and protocol design and documentation.

Couple quest: Simple foreplay game for couples. Show some tasks and count points.

Curse of War: Curse of War is a fast-paced action strategy game for GNU/Linux implemented using C and ncurses. Since version 1.2.0, there is also an SDL version. Unlike most RTS, you are not controlling units, but focus on high-level strategic planning: Building infrastructure, securing resources, and moving your armies. The core game mechanics turns out to be quite close to WWI-WWII type of warfare, however, there is no explicit reference to any historical period.

Cursewords: Cursewords is a "graphical" command line program for solving crossword puzzles in the terminal. It can be used to open files saved in the widely used AcrossLite .puz format. Cursewords includes nearly every major feature you might expect in a crossword program, including intuitive navigation, answer-checking for squares, words, and full puzzle, a pausable puzzle timer and a puzzle completeness notification. It is currently under active development, and should not be considered fully "released." That said, it is stable and suitable for everyday use.

Cuteframework: Cute Framework (CF) is the cutest framework available for making 2D games in C++. It provides a portable foundational layer for building 2D games in C/C++ without baggage, gnarly dependencies, or cryptic APIs. CF runs almost anywhere, including Windows, MacOS, iOS, Android, Linux, and more!

Cytopia: Cytopia is a highly moddable, pixel-art city building game based on SDL2 that is currently under development. The game features terrain manipulation, procedural terrain generation, and a custom UI system based on JSON.

Daily Pictures

Features

receive a notification every day to take a picture
save the picture right inside the app (you can delete it from your Camera Roll)
share pictures from the app, or save it back to Camera Roll
add a title or note to each picture
keep track of interesting statistics (how many pictures you’ve taken, how many are left to take this year, how much space you’re using)
works on iOS 5 and iOS 6 (and iOS 7 of course)

DataMelt: DataMelt (DMelt) is an environment for numeric computation, statistical analysis, data mining, and graphical data visualization on the Java platform. This Java multiplatform program is integrated with a number of scripting languages: Jython (Python), Groovy, JRuby, BeanShell. DMelt can be used to plot functions and data in 2D and 3D, perform statistical tests, data mining, numeric computations, function minimization, linear algebra, solving systems of linear and differential equations. Linear, non-linear and symbolic regression are also available. Neural networks and various data-manipulation methods are integrated using powerful Java API. Elements of symbolic computations using Octave/Matlab scripting are supported.

Dia: Dia is a program for creating diagrams of all kinds. It can create many types of diagrams, including UML, network and flowchart diagrams. The engine is very flexible and dynamically loads diagram-types from disk. Dia can also print diagrams and export tham to a number pf formats including EPS, SVG and PNG.

Dibuja: Simple to use paint program like classic MS Paint or Paintbrush for Mac but for Linux. Easily create drawings and edit images. Add arrows, text, and effects to your drawings and pictures or crop and resize your images.

DrMario (Uzebox): Implementation of the DrMario game to run on the Uzeboz. This version of the game has 1 and 2 player modes.

Dungeon Crawl Stone Soup: Dungeon Crawl Stone Soup is a free roguelike game of exploration and treasure-hunting in dungeons filled with dangerous and unfriendly monsters in a quest for the mystifyingly fabulous Orb of Zot. Dungeon Crawl Stone Soup has diverse species and many different character backgrounds to choose from, deep tactical game-play, sophisticated magic, religion and skill systems, and a grand variety of monsters to fight and run from, making each game unique and challenging. Dungeon Crawl Stone Soup can be played offline, or online on a public telnet/ssh server thanks to the good folks at crawl.akrasiac.org (CAO) and crawl.develz.org (CDO). These public servers allow you to meet other players’ ghosts, watch other people playing, and, in general, have a blast!

Dungeon-mode: Dungeon-mode is a game engine and REPL for creating and playing multi-user dungeons written primarily in emacs lisp. While playing a game created with dungeon-mode doesn’t necessarily require Emacs authoring game environments (e.g. worlds) does, as do assigning special powers, resolving Ghod calls, Sage encounters, and Ubic -if enabled- or any other or custom events with a dm-intractable property set to a non-nil value. Dungeon Masters may specify delegation rosters to support cooperative oversight and enable teams to direct the play experience.

Endless Sky: A sandbox-style space exploration and combat game similar to Escape Velocity, Elite, or Star Control. Explore the universe. Earn money by trading, carrying people, or completing missions. Buy a better ship and upgrade your weapons and engines once you have enough money. Help the governments blow up pirates. Or become one. Find aliens hoping their culture is more civilized than your own. Or, to make a mark in the galaxy, take sides in an imminent civil war.

Epix: 'ePiX', a collection of batch programs, creates mathematically accurate fgures, plots, and animations containing LaTeX typography. The input syntac is easy to learn. The output -- vector image files or LaTeX picture-like environments -- is expressly designed for use with LaTeX.

FLIF: FLIF is a novel lossless image format which outperforms existing image formats in terms of compression ratio. It works well on any kind of image (photographic, line art, computer graphics, etc.) and also supports animations. FLIF images (or animations) can be progressively decoded, which makes the format potentially very suitable for responsive web design. This is the reference implementation of FLIF, which includes a command-line tool (flif) to convert between FLIF and PNG/PNM/PAM, a decoding library (libflif_dec), an encoding library (libflif_enc), some scripts (gif2flif, apng2flif, raw2flif, ...), and a simple image/animation viewer (viewflif).

Farbfeld Utilities: A simple format for dealing with pictures, which is 16-bits per channel RGBA. These program can convert to/from other format and make various effects with them; some also make up new pictures.

Fbi-improved: FIM is a lightweight universal image viewer, mostly for GNU/Linux (but not only). FIM aims to be a highly customizable and scriptable image viewer for users who are comfortable with software like the VIM text editor or the Mutt mail user agent. It has been developed with GNU/Linux in mind, but can be built to run on several Unix systems or even on MS-Windows.

Firestr: Fire★ is a a simple platform for decentralized communication and computation. Provides a simple application platform for developing p2p applications and share these applications with others in a chat like user interface. You don't send a message to someone, you send an program, which can have rich content. All programs are wired up together automatically providing distributed communication, either through text, images, or games. The source code to all applications is available immediately to instantly clone and modify.

FractGen: FractGen is a simple Qt-based fractal generator program for Mandelbrot fractals. The image size is only limited by virtual memory. It is possible to zoom into images. Image parameters can be saved in XML files and loaded from XML files. Calculated images can be exported as PNG files. The intention of this program is to generate graphics to be post-processed by other image tools, e.g. in order to generate nice screen backgrounds or book covers.

Free Oberon: Free Oberon is a cross-platform IDE for development in Oberon programming language made in the classical FreePascal-like pseudo-graphic style. Compilation of user-written programs is performed using the Vishap Oberon Compiler and then GCC. The compiled console programs can be run in the built-in terminal emulator.

FroZenLight: FroZenLight connects simple line art and mathematics. The source of light can be positioned so that either symmetric reflection patterns or secret messages (Cryptography) are created. Dozens of example light patterns and some math exercises are provided.

GDevelop: GDevelop is a game development IDE and engine, that can create native and HTML5 games.

GRX: GRX is a 2D graphics library originally written for DJGPP. It supports DOS, GNU/Linux console (svgalib and framebuffer drivers), X11, and Win32 (using the Mingw compiler).

Gargoyle: Gargoyle is an IF player that supports all the major interactive fiction formats. Most interactive fiction is distributed as portable game files. These portable game files come in many formats. In the past, you used to have to download a separate player (interpreter) for each format of IF you wanted to play. Gargoyle is based on the standard interpreters for the formats it supports. Gargoyle is free software released under the terms of the GNU General Public License.

Garlic-player: The garlic player is a SMIL compatible media player software for digital signage. It displays different digital signage content, such as images, videos, and interactive applications, on a screen. The garlic-player can be used and administrated locally or remote via Internet.

GemRB: The goal of this engine re-implementation project is to make the Infinity Engine games available on a wide range of platforms forever, fix or avoid old bugs, add new features and provide a superb platform for mod (and eventual game) development.

Gestalter: Gestalter is a free vector drawing program. Its central element, the Bezier curve, is used as a base part for almost every other object. Complex paths are possible, compound paths can be constructed, grouping of elements is enabled, and everything can be screened by a mask. Adding and deleting of nodes is implemented as well as transformations (translation, rotation, scaling, and skewing).

Gimp ,: The GNU Image Manipulation Program is a powerful image editing program, and commonly used for photo retouching, image composition, and general graphic design work. It can be used as a simple paint program, an expert quality photo retouching program, an online batch processing system, a mass production image renderer, an image format converter, etc. GIMP also comes with extensive documentation for both users and programmers, including a manual, tutorials, examples of various features, links to other GIMP-related sites and an extensive list of plug-ins.

Giv: giv, The G(reat tk NU) Image Viewer, is an image viewer based on the gtk_image_viewer widget. It was designed especially for scientific vision and computational geometry and has support for drawing vector graphics on top of an image.

Glaxnimate: Glaxnimate is a vector graphics animation program which focuses on being quick and easy to use. It's designed to work well with short animations to show on the web, supporting several common web formats like GIF, WebP, Lottie, SVG, and others.

Gnome-photos: GNOME Photos is an application that allows users to easily access, organize and share their photos when using the GNOME desktop environment. It's also a photo editor and has a number of photo editing tools built-in, including crop, auto-enhance, and color adjustments.

Gnuastro: The GNU Astronomy Utilities (Gnuastro) is an official GNU package consisting of separate programs and library functions (in C and C++) for the manipulation and analysis of astronomical data. All the various utilities share the same basic command line user interface for the comfort of both the users and developers. GNU Astronomy Utilities is written to comply fully with the GNU coding standards so it integrates finely with the GNU/Linux operating system. This also enables astronomers to expect a fully familiar experience in the source code, building, installing and command line user interaction that they have seen in all the other GNU software that they use.

Godot

Godot is a 2D and 3D game engine, featuring:

Use your eyes
- Work inside a simple, yet flexible and feature rich editor, with tools popping up to aid you only when you need them.
Develop 2D games
- Create complex 2D games with the fully dedicated 2D engine (no need for 3D over 2D), using pixel coordinates and a wide array of tools.
Develop 3D games
- Create realistic looking 3D games with the dedicated 3D Engine, with full support for lights, shadows, occlusion, post processing, skeletal animation, etc.
Script
- Add custom behaviors to any object by extending it with scripting, using the built-in editor with syntax highlighting and code completion.
Design
- Create simple or complex user interfaces, or make your own custom tools to edit your game content.
Animate
- Animate your games with full support for editing, blending, animation trees, realtime cutscenes, calling function, or animate just any property exported by any node.
Simulate
- Add physics to your 2D and 3D scenes, through rigid and static bodies, characters, raycasts, vehicles and more.
Debug
- Use the built-in debugger with breakpoints and stepping, or check the performance graphs for possible bottlenecks.
Deploy
- One-click deploy to several platforms, such as GNU/Linux, OS X, Windows, Android, iOS, BB10 and HTML 5.
Extend
- Extend the editor and your game by using plugins, which add extra functionality for both.
Work in a team
- Develop projects in a team using any choice of VCS, as Godot integrates flawlessly with all of them.

Gpaint: Gpaint is a small, easy-to-use paint program for GNOME. It features drawing tools (ovals, freehand, polygon, and text, with fill or shallow for polygons and closed freehand), the ability to cut and paste by selecting irregular regions or polygons, print support using gnome-print, a modern, easy-to-use user interface with tool and color palettes, the ability to edit multiple images at the same time with running multiple sessions of gpaint, and all the image processing features present in xpaint.

Grace: Grace is a WYSIWYG 2D plotting tool to plot numerical data under the X Windows System and Motif (recent versions of Lesstif should be fine too). It combines a GUI with a scripting language to do calculations or automated tasks. Grace is a descendant of ACE/gr, also known as Xmgr.

GrafX2: A pixel-art focused tool inspired by Deluxe Paint. Originally running on MS-DOS as a bitmap editor authored by the team at Sunset Design, has now been ported to several platforms including GNU/Linux, BSDs, HaikuOS, etc.

Gravit Sandbox: Gravit is a gravity sandbox made with python and pygame. It is composed of a launcher and a simulator.

Gsegrafix: GSEGrafix is an application which produces high-quality graphical plots for science and engineering. Plots are specified via simple ASCII parameter files and data files and are presented in an anti-aliased GNOME canvas. The program supports rectangular two-dimensional plots, histograms, polar-axis plots and three-dimensional plots. Plots can be printed or saved to BMP, JPEG or PNG image formats. GSEGrafix can also be run both from a command prompt and from Octave.

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