Qt is a cross-platform application framework. Using Qt, you can develop applications and user interfaces once, and deploy them across many desktop and embedded operating systems without rewriting the source code.
Developed by GNU project as free compiler for GNU system. Front ends: C, C++, Objective-C, Fortran, Java, Ada; libraries for libstdc++, and libgcj. Mission, mail lists, timeline, contributors, committee, instructions, manual, FAQ, downloads...
Dedicated to managing and promoting the Open Source trademark for the good of the community. Includes a definition of 'Open Source', and a list of approved licenses.
Home page for Python, an interpreted, interactive, object-oriented, extensible programming language. It provides an extraordinary combination of clarity and versatility, and is free and comprehensively ported.