- Elektra is a configuration management framework, it mounts configuration files into global keys database creating sort of virtual file system for easier access, changing and locating the configuration parameters. A wide range of plugins is available used to specify format (JSON, INI, XML and others), default settings , validation, etc. Use High-level API to elektrify your application for easier maintenance and generate type-safe configuration access code based on same specification used for validation. The core is the library implemented in C, bindings to another languages are provided.
- 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).
- The Farstream (formerly Farsight2) project is an effort to create a framework to deal with all known audio/video conferencing protocols. On one side it offers a generic API that makes it possible to write plugins for different streaming protocols, on the other side it offers an API for clients to use those plugins. This package provides Python bindings for Farstream.
- FFmpeg is a complete solution to record, convert and stream audio and video.
Its components include:
- ffmpeg – Converts one video file format to another and supports grabbing and encoding in real time from a TV card.
- ffserver – HTTP (RTSP is being developed) multimedia streaming server for live broadcasts that supports time shifting.
- ffplay – simple media player based on SDL and the ffmpeg libraries
- ffprobe – a media file prober
- libavcodec – library containing all FFmpeg audio/video encoders and decoders (most developed from scratch for best performances and high reusability)
- libavfilter – video and audio filtering library
- libavformat – library of parsers and generators for all common audio/video formats
- libavutil – utility library containing functions used by all FFmpeg components
- libswscale – video scaler and pixel format converter
- libswresample – audio resampler and sample format converter
- libpostproc – video post-processing library
- 'GEOS' is a C++ implementation of the functions and predicates defined in the OpenGIS "Simple Features for SQL" specification. It includes high quality implementations of all important spatial relationships and operations, robust versions of all functions in the dimensionally extended 9 intersection predicate model, and implementations of the operators Buffer(), Union(), and Intersection() and all other SFSQL functions including Area(), Length(), Centroid(), etc.
- 'gengetopt' takes an easy-to-do description of options and generates a C function that uses the GNU getopt_long(3) function to parse and validate the options. gengetopt is perfect if you don't want to write all the stuff required to call GNU getopt_long(3), or if you have a program and wish it took many options. The generated code works if you use autoconf or automake.
- Geocode-glib allows you to do geocoding (going from a place name, to a longitude/latitude pair) and reverse geocoding (finding a place name from coordinates) using the Nominatim service. This library should be used in place of Geoclue's D-Bus API for geocoding and reverse geocoding.
- GMP is a library for arbitrary precision arithmetic, operating on signed integers, rational numbers and floating point numbers. The precision is only limited by the available memory. The library is highly optimized, with a design focus on execution speed. It is aimed at use in, for example, cryptography and computational algebra.
- GnuAE is a GNOME/GTK compliant GUI for designing photovoltaic and wind powered houses with compliance to the National Electrical Code. As GnuAE has a database of components and current average prices, it can help you judge the total cost of a system by experimenting with different options like using a propane or DV fridge, or more or less reserve days or hours of sun. GnuAE is also designed to make it much easier to wire for NEC code compliance without studying all 800 some pages of the NEC specification. Even for an electrician, the interdependencies between calculations is daunting. While DC wiring is much simpler than AC wiring, most off-grid household systems are both. There is even a built in NEC calculator for people that have a good feel for what they are doing, but want to also experiment with differing conduit sizes, parallel wire runs, and voltage drop.
- GnuDOS is a set of programs designed to help new users of the GNU system in growing accustomed to the system, particularly users who might be coming from a DOS background. It consists of a file manager, a text editor and a form designer for the console as well as a core library for building similar utilities:
- The core library (corelib) contains four utilities: Kbd (for keyboard handling), Screen (for screen drawing), Dialogs (for dialog boxes/window drawing), and Strings (for strings functions).
- The software applications are three: Prime (console file manager), Mino (console text editor), and Fog (console form designer).
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