Usability and User Testing Apps

Here are some usability and user testing tools:

Personal preferences:

 

Other tools:

 

Also check the Usability Checklist http://userium.com/

Or you can always ask people via: Amazon Mechanical Turk

Wireframing and Prototyping Tools

A list of wireframing and prototyping tools I encountered:

More tools at : http://c2.com/cgi/wiki?GuiPrototypingTools