Lisp

Embeddable Common Lisp, implementation to embed in C-based programs; FTP site.

ANSI CL and IDE with cross-platform GUI tools for Linux, Mac OS X, Unix, Windows. Related products and services. Free and commercial versions.

Collection of major and minor modes, user interface enhancements, and library routines.

The official resource for all Elisp questions.

Subscription information and archives.

Online Flash version of Logo with basic commands for turtle geometry.

Article with sample procedures demonstrating capabilities and structure of the Logo programming language.

A portable Perl-compatible regular expressions for Common Lisp. [Open source, BSD-style license]

The up-to-date official page for this alternative to Gnus, Rmail, and the others.

A source code browser for Emacs. It is a global minor-mode which displays a couple of windows that can be used to browse directories, files and methods. It supports method parsing for Java, C, C++, Elisp. [Open source, GPL]

Expands tex-mode with ConTeXt awareness. Created by Berend de Boer.

For MSWLogo or UCBLogo. P. A. Dreyfuss.

Specialized Logo version which lets you to control thousands of graphic turtles in parallel, which can be programmed to react to their environment. MIT.

A logo learning and drawing application written in Objective-C for Mac OS X. [Open source, BSD License] Jeff Skrysak.

Offers web integration, powerful animation and multimedia capability. Logotron Ltd.

Logo-inspired open-source translatable programming environment for the KDE Desktop. Cies Breijs.

Versions for Java, J# for .NET, partial on-going port to C# using MS JLCA: Java Language Conversion Assistant. Downloads, documents.

Interactive Logo projects for exploring math and technology. Wendy Petti.

Descriptions, downloads for 4 games, construction kit themes; from Greatest Places Online, Science Museum of Minnesota.

A compilation of colleges, universities, and secondary schools which use Scheme in their curricula. Compiled and maintained by Ed Martin of Schemers, Inc.

Scheme-like language developed at Yale; is to Scheme rather as NIL is to Lisp; mainly of interest to historians and theoreticians. FTP for v3.1.

Based on Mini-Scheme, tiny implementation, almost a full R5RS Scheme. Goal: embedded scripting use, but works as standalone interpreter and extensible shell tool. Recent changes reduced executable size to about 64KB on Linux/x86. [BSD]

Based on XLisp, but with built-in statistics support.

For DrScheme, semi-structured program editing; an alternative set of key bindings. When it is on, the most important functions can run via unchorded keystrokes, and motion commands work on sexps by default.

Guile bindings for Gtk+.