Sorry for the deluge of links about usability, but when you get a good set together it is nice to share. Im sure there is something here for you if you make software with an user interface.
A new community-based platform to support the open conversations between companies who make products and the customers who use them.
Five Second Usability Test
When to use which user experience research methods
Using the Microsoft Ribbon without anyone getting hurt.
A list of GUI prototyping tools
Choosing colors for your brand.
Concept design tools