ctalk
Object Oriented Language
...-time library, and a developing set of X widgets and OpenGL classes to create desktop and 3-D modeling apps. Written for use with GNU GCC and LLVM, Ctalk supports a variety of UNIX, Linux, and MacOS systems, the X Window System, and libraries like the GNU readline library, and the Xft Type1, FreeType and TrueType font libraries.
To find out what's new in the latest release, check out the ReleaseNotes page of the Ctalk Wiki which is available by clicking on the tab above.