Anything related to the <a href="http://nphysics.org">nphysics</a> physics engine.
Anything related to <a href="http://nalgebra.org">nalgebra</a>, the linear algebra library.
Anything related to the <a href="http://ncollide.org">ncollide</a> collision detection library.
Announcements about new releases, features, etc.
Discussion about this site, its organization, how it works, and how we can improve it.