Epiphany is a GNOME web browser based on the mozilla rendering engine (Gecko). The name means: "An intuitive grasp of reality through something (as an event) usually simple and striking".
ORBit2 is a CORBA 2.4-compliant Object Request Broker (ORB) featuring mature C, C++ and Python bindings. The core ORB is written in C, and runs under Linux, UNIX (BSD, Solaris, HP-UX, ...), and Windows. [Open Source, GPL/LGPL]
Lightweight editing tool for the GNOME desktop found in many distributions of Linux, BSD and other Unix systems. Offers a complete integration with the GNOME Environment, search and replace, configurable plugins system, command line pipes, print/print...
A diagram creation tool that supports UML modeling and runs primarily on Linux but also Windows and Irix. The interface is similar to the commercial Microsoft Visio. [Open Source, GPL]