- Hy is a Lisp front-end to the Python AST / Bytecode. This allows you to use the Python VM just as Clojure uses the Java VM. Hy is special, since not only can Hy invoke Python, but Python can also interop with Hy in a clean way.
- The libffi library provides a portable, high level programming interface to various calling conventions. This allows a programmer to call any function specified by a call interface description at run time. FFI stands for Foreign Function Interface. A foreign function interface is the popular name for the interface that allows code written in one language to call code written in another language. The libffi library really only provides the lowest, machine dependent layer of a fully featured foreign function interface. A layer must exist above libffi that handles type conversions for values passed between the two languages.
- MARST is an Algol to C translator. It automatically translates programs written in the algorithmic language Algol 60 to the C programming language. The package includes three main components: the translator, MARST, that translates Algol 60 programs to the C programming language; the library, ALGLIB, that contains precompiled standard Algol 60 procedures and other necessary library routines (this library, referred to as libalgol.a in the distribution, is to be used at linking stage); and the converter, MACVT, that converts existing Algol 60 programs from other representations to MARST representation.
- My Knowledge Explorer
- My Knowledge Explorer uses the mKR (my Knowledge Representation) language to create, query and update mKB (my Knowledge Base). mKR is a useful mixture of English (subject, verb, object, preposition phrase) and the KornShell (variables, procedures, control structures). mKB can be a local user KB or an internet KB such as OpenCyc. The Redland RDF Library commands can be used to translate mKR to/from standard W3C languages such as Turtle and SPARQL.
- Graphviz's dot language Python interface. This module provides with a full interface to create handle modify and process graphs in Graphviz's dot language.
- Pymacs is a powerful tool which, once started from Emacs, allows both-way communication between Emacs Lisp and Python. Pymacs aims Python as an extension language for Emacs rather than the other way around, and this asymmetry is reflected in some design choices. Within Emacs Lisp code, one may load and use Python modules. Python functions may themselves use Emacs services, and handle Emacs Lisp objects kept in Emacs Lisp space.
- Compatibility library from Python 2 to 3.
- Ruby Sass
- Sass makes CSS fun again. Sass is an extension of CSS3, adding nested rules, variables, mixins, selector inheritance, and more. It's translated to well-formatted, standard CSS using the command line tool or a web-framework plugin. This is an implementation of Sass language written in Ruby.
- simplejson is a simple, fast, complete, correct and extensible JSON <http://json.org> encoder and decoder for Python 2.5+ and Python 3.3+. It is pure Python code with no dependencies, but includes an optional C extension for a serious speed boost.
- Umple technology for adding UML constructs to programming languages, or representing models textually; includes a code generator, Eclipse plugins, and the UmpleOnline web app
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