User Testing Tools

Remote user testing apps:
http://www.usertesting.com/
http://userfly.com/
http://www.loop11.com/

Local user testing apps (requires computer and quick install):
http://silverbackapp.com/

Remote card sorting:
http://websort.net/

Click testing:
http://www.optimalworkshop.com/chalkmark.htm

A/B testing:
https://www.google.com/analytics/siteopt/
http://www.optimizely.com/

Quick user feedback:
http://verifyapp.com/
http://www.fivesecondtest.com/