BigBlueButton is a Web conferencing system that focuses on usability, modularity, and clean design, both for the user and developer. It implements real-time sharing of voice, Web cams, desktops, slides, and chat messages to provide remote students with a high-quality learning experience. Unlike other conferencing systems, the desktop sharing works on Mac OS X, Unix, and PC computers, and there is no hard-coded limit on the number of simultaneous Web cams.
Rapicorn is an experimental UI toolkit. It strives to apply modern technologies properly to all aspects of the toolkit implementation. Such technologies include pthreads, XCB, Cairo, compositing, IDL, XML notation, path evaluation, DSLs, unit tests, and SVG. Rapicorn is developed on this base with the aim to significantly improve developer efficiency and user experience.