scheme-lib: duck lib scheme for gui gles gl slib openal socket web mongodb box2d game glfw mysql libevent libuv uv json http client server android osx linux chezscheme scheme-lib
pencog: A framework for integrated Artificial Intelligence & Artificial General Intelligence (AGI)
lambdanative: LambdaNative is a cross-platform development environment written in Scheme, supporting Android, iOS, BlackBerry 10, OS X, Linux, Windows, OpenBSD, NetBSD, FreeBSD and OpenWrt
chicken-nrepl: Networked REPL over TCP for Chicken Scheme
xiphos: Xiphos is a Bible study tool written for Linux, UNIX, and Windows using GTK, offering a rich and featureful environment for reading, study, and research using modules from The SWORD Project and elsewhere
Scheme-Power-Tools:An assorted collection of Scheme utilities. Implements native monads, pattern matching, generic operator dispatch, serialization, event handling, memoization, suffix trees, among other things. It started as an attempt to add functionalities I missed from other languages such as Haskell, and eventually grew into a larger library
ydiff: a language-aware tool for comparing programs
awful: awful provides an application and an extension to ease the development of web-based applications in CHICKEN Scheme
webmk: miniKanren for interactive tutorials on the web