MIT/GNU Scheme is an implementation of the Scheme programming language, providing an interpreter, compiler, source-code debugger, integrated Emacs-like editor, and a large runtime library. MIT/GNU Scheme is best suited to programming large applications with a rapid development cycle. Recent versions of the system are supported on the following platforms: GNU/Linux, *BSD, OS/2, and Windows.
CodeGuide is a lean and fast IDE for Java and JavaServerPages. It features on-the-fly error checking, incremental background ("instant") compilation, powerful refactoring capabilities, and support for generic types. A visual debugger with on-the-fly class replacement (HotSwap) is also included.
Visual Tcl (vtcl) is a visual application development environment written entirely in TCL/Tk and generating pure TCL/Tk code. Therefore, both vtcl itself and applications produced by it are 100% portable. It can import existing TCL code, and can export TCLets which run inside Netscape or MSIE.
Racket (formerly PLT Scheme) is a programming language suitable for implementation tasks ranging from scripting to application development, including GUIs, Web services, etc. It includes the DrRacket programming environment, a virtual machine with a just-in-time compiler, tools for creating stand-alone executables, the Racket Web server, extensive libraries, documentation for both beginners and experts, and more. It supports the creation of new programming languages through a rich, expressive syntax system. Example languages include Typed Racket, ACL2, FrTime, and Lazy Racket.
GNU TeXmacs is a free wysiwyw (what you see is what you want) editing platform with special features for scientists. The software aims to provide a unified and user friendly framework for editing structured documents with different types of content: text, mathematics, graphics, interactive content. TeXmacs can also be used as an interface to many external systems for computer algebra, numerical analysis, and statistics. New presentation styles can be written by the user and new features can be added to the editor using Scheme.
PerlComposer (formerly known as VisualPerl) is a GUI builder which can be used to write GTK/GNOME programs in Perl with a WYSIWYG interface builder. Currently, it only contains an interface builder, text editor, and project manager. In the future, it will include a debugger, profiler, and version control system as well. The goal is to produce a fully-functional rapid prototype design (RAD) tool for Perl/GTK.