wxWidgets is an open source cross-platform GUI toolkit, with ports for Linux/Unix (GTK+, X11, Motif, MGL), Windows, Windows Mobile, Mac OS X, and OS/2. You can write wxWidgets applications in several languages including C++, Python, C#, Ruby, and Perl. Thousands of commercial and non-commercial organizations rely on wxWidgets; notable applications include Audacity, Juice podcast receiver, AVG Antivirus, Forte Agent, BitWise IM, and Tortoise CVS.