GnuCash is a personal and small-business finance manager with a check-book like register GUI to enter and track bank accounts, stocks, income and expenses. GnuCash is designed to be simple and easy to use but still based on formal accounting principles.
a web server written in gambit/scheme that implements push technology and abstracts it trought actor model, implements too a compiler of yera, a language to describe gui in terms of functional reactive programming.
A GTK-server based GUI for Bigloo Scheme; a Windows distribution for both Bigloo, and GTK2. Tutorials on how to call GTK2 procedures from Scheme. A simple GUI for OCaml. It offers two kinds of widgets, to wit, buttons and an Emacs like mini-editor.
Fungus is a framework for distributed simulation by multi-agents.
It uses a very modular architecture.
A GUI is provided.
In our model, everything is Agent. Even the environnement.
You have an access to the communication's 'canals'.
WHISPER is a modular software that handles either local or remote data streams. For now, it comes with a VoIP application, using two core libraries. Recents developments (WHISPER+) intend to provide a interface to Guile and a GUI.