Open Source Physics, or OSP, is a project sponsored by the National Science Foundation and Davidson College, whose mission is to spread the use of open source code libraries that take care of a lot of the heavy lifting for physics: drawing and plotting, differential equation solvers, exporting to animated GIFs and movies, etc., tools, and compiled simulations for physics and other numerical simulations . The OSP collection provides curriculum resources that engage students in physics, computation, and computer modeling. The code library is in the Java programming language and licensed with GNU General Public License (GNU GPL or simply GPL) licenses. The site now serves over 10,000 visitors per month. The Open Source Physics Project is an extension of the Physlet Project.