A package that supports writing and formatting TeX files. Many different macro packages are supported, including AMS TeX, LaTeX, and TeXinfo.

An attempt to embed LaTeX environments such as display math or figures into the source buffers. Provides the manual, mailing list, screenshots and download.

A package that provides distinct support for doing labels, references and citations in LaTeX for both Emacs and XEmacs. It runs as a minor mode with any LaTeX major mode, most notably AUCTeX. Bundled and preinstalled with Emacs since version 20.2, or ...

GNU's Ubiquitous Intelligent Language for Extension, a library implementation of the Scheme language plus various convenient facilities. Designed to be linked into programs to make them extensible.

Guile bindings for Gtk+.

Object-oriented extension to Guile; very close in spirit to Common Lisp Object System, CLOS (CLtL2), but adapted for Scheme language; gives full OO system with multiple inheritance, generic functions with multi-method dispatch.

Scheme environment, written in Java, compiles Scheme code to Java bytecode. [Open Source, modified GPL]

Powerful (Turing-equivalent) implementation of traditional Unix macro-expansion program, designed as preprocessor to more stubborn languages. Ugly, but fairly standard, available on most platforms.

Documentation of the Regular Expression syntax used in GNU Awk.

Documentation of the Regular Expression syntax used in Emacs Lisp.