Cross platform GUI for Maxima
wxMaxima is a cross-platform graphical front-end for the computer algebra system Maxima based on wxWidgets. It provides nice display of mathematical output and easy access to Maxima functions through menus and dialogs.
CLISP is a portable ANSI Common Lisp implementation and development environment by Bruno Haible. Interpreter, compiler, debugger, CLOS, MOP, FFI, Unicode, sockets, CLX. UI in English, German, French, Spanish, Dutch, Russian, and Danish.
Nyquist is a language for sound synthesis and music composition. It is implemented in C and C++ and runs on Win32, OSX, and Linux. Nyquist combines a powerful functional programming style with efficient signal-processing primitives.
Computer Adventure Game Editor and Environment, multi-platform engine and development system for cinematic, image, and panoramic interfaces, to be extended to 3-D geometric, oblique/orthographic, plan, elevation, etc.
Carneades is an argument mapping application, with a graphical user interface, and a software library for building applications supporting various argumentation tasks.
OS based on Agent based Security with a new type of split kernel and agents platform.
Squeakymail is an email classifier and POP proxy, implemented in Common Lisp. Currently it is running with Allegro CL from Franz Inc. Squeakymail implements concepts from Paul Graham's Plan for Spam paper at http://www.paulgraham.com/spam.html.
A game developed by Reddit community
This is an Open Source game based on drumo's design and concept art which is developed by Reddit community. If you don't use Reddit, you are still more then welcome to use it.
Contraband is a roleplaying game of intrigue, diplomacy, smuggling and good old-fashioned adventure. It's written in Common Lisp and uses the Langband engine.
jfli is a library for Common Lisp that provides comprehensive, safe, dynamic and Lisp-y access to Java and Java libraries as if they were Lisp libraries, for use in Lisp programs, i.e. emphasizing working in Lisp rather than in Java.