openFrameworks is an open source toolkit designed for "creative coding". OpenFrameworks is written in C++ and built on top of OpenGL. Developed by Zach Lieberman, Theodore Watson, and Arturo Castro, with help from the OF community.
License: Open Source
OpenFrameworks is a C++ library that provides more control and flexibility, making it suitable for advanced programming and complex projects, while Processing, with its user-friendly syntax and rapid prototyping capabilities, is better suited for artists and designers looking to create visual projects quickly.