Vala
Vala is new language adopted by the Gnome community for developing software with glib and gobject based libraries (but not limited only to those).
Vala is a high level, object oriented language, with a syntax close to C#.
RidgeRun uses vala (and supports the technology on the SDK) for rapid application development in different projects.
For more information, visit the vala site, or look for the list of projects we work using Category:Vala.