Bork is a very small, cross-platform file encryption utility using a password-based RC4 algorithm. It is designed to be included in source code form along with the files it encrypts for long-term storage (eg on CD-R). Its minimal external dependencies are designed to make it fairly futureproof.
Anca is an H.323 client for Qt 3.x. It allows communication (voice/video) with other similar clients over the Internet, e.g. Gnomemeeting. Its design is minimalist and clean, and has support for embedded devices. It is very modular, and has the following plugins: addressbook (LDAP support), video-in (v4l support), video-out (framebuffer support for embedded devices), and DTMF tones.
GENE Graph Export Engine is a complex convertor/framework for multi-namespace XML transforming and exporting. It is able to convert various XML types including SVG, DocBook, MathML, XSL-FO, and their combinations into a wide area of output formats: PDF, PNG, SVG, PS, MIF, RTF, and XHTML. Custom XSLT scripts can be registered easily and are used automatically. It requires Sun JRE 5.0.