Here are mine:
- GLFW library - This one is really underrated IMO, it kills me to see people still use glut when GLFW is such a better alternative.
- OpenRL - I'm really happy it exists and I hope it doesn't die anytime soon, even if it's not ready for prime time yet. The heterogeneous approach is excellent imo.
- WM_POINTER* messages - I really like what they're doing with the new unified input stack library in Windows 8. It allows developers to treat touch, mouse and styluses as generic "pointer" devices.
(I'm sure I'm leaving out many, but these are my top favs off the top of my head)
What are yours? Feel free to repeat what others have mentioned if it's your favourite too.
Edited by shurcool, 01 May 2012 - 03:07 PM.