I developed a patch that added the VAO WebGL extensions earlier this year and it's finally out there! So. Cool. And everyone at mozilla is really helpful if you're thinking about contributing for the first time.
Although lately I haven't worked in anything, would like to hear about more great opensource projects.
With many projects though, some conflate "my patch was rejected" for "they're jerks" without understanding the impact of their fix/suggestions. Feature bloat, backwards compat, API verbosity, etc all add up.
http://www.opengl.org/registry/specs/ARB/vertex_array_object...
http://www.extremetech.com/gaming/154994-epic-mozilla-releas...