The GLSL.io initiative aims to build an Open Collection of GLSL Transitions. It aims to be highly community-driven and free-software.
<iframe width="853" height="480" src="//www.youtube.com/embed/BYdCNTJaGss" frameborder="0" allowfullscreen="allowfullscreen"></iframe>No data are kept on our servers, data is all stored in Github Gists.