Processing is probably the most popular and accessible. OpenFrameworks and Cinder are probably a bit more powerful, but more difficult to use (built around c++

Processing is probably the most popular and accessible. OpenFrameworks and Cinder are probably a bit more powerful, but more difficult to use (built around c++). I also like PaperJS, which is built around JavaScript, but doesn't have the performance of Processing and OpenFrameworks. Finally, you can just use raw drawing APIs (such as Canvas in the browser). Good list of resources here: https://github.com/kosmos/awesome-generative-art https://github.com/kosmos/awesome-generative-art