These are what I found taking a quick look through the standard library (http://nitlanguage.org/doc/stdlib/):
- OpenGL Wrapper A (http://nitlanguage.org/doc/stdlib/group_egl.html)
- OpenGL Wrapper B (http://nitlanguage.org/doc/stdlib/group_glesv2.html)
- emscripten framework (http://nitlanguage.org/doc/stdlib/group_emscripten.html)
- Github API wrapper (http://nitlanguage.org/doc/stdlib/group_github.html)
- Web Framework A (http://nitlanguage.org/doc/stdlib/group_nitcorn.html)
- Web Framework B (http://nitlanguage.org/doc/stdlib/group_popcorn.html)
- Game Framework A (http://nitlanguage.org/doc/stdlib/group_mnit.html)
- Game Framework B (http://nitlanguage.org/doc/stdlib/group_gamnit.html)
- Game Framework C (http://nitlanguage.org/doc/stdlib/group_bucketed_game.html)
- Game Framework D (http://nitlanguage.org/doc/stdlib/group_scene2d.html)
- A twitter like web app (http://nitlanguage.org/doc/stdlib/group_tnitter.html)
- Web app for planning meetups (http://nitlanguage.org/doc/stdlib/group_opportunity.html)
- An unofficial app for bargoers?? (http://nitlanguage.org/doc/stdlib/group_benitlux.html)