BRL-CAD is an open source constructive/solid geometry/solid modeling system; includes an interactive geometry editor, ray-tracing support for rendering and geometric analysis.
Dr. Geo is an open source interactive geometry program which allows users to construct dynamic figures; allows users to use geometric transformations such as rotation and translation.
Nihon-go Flash is meant for beginners and intermediates learning to read Japanese writing; currently only Hiragana and Katakana are supported, and it does not require any Japanese specific fonts or language settings.
InteliEditor is a very lightweight, full-featured, multi-language, WYSIWYG HTML editor written in JavaScript, DHTML, PHP, and ASP; designed to be used wherever Rich Text is needed.
