Survey tools with support for multiusers

This is actually part of a software investigation I did for work. We’re looking for a survey tool (preferably free) which has the ability to create accounts within a large account and some user management (survey creators can only see their own surveys unless they are shared)

I reached out to my network and here are their answers:
Survey Tools

…

• Write their own using PHP w/ PostgreSQL
• Google Forms with the Google Spreadsheet – commercial (free), web/cloud
• Limesurvey – opensource (free), hosted – http://www.limesurvey.org/
• Qualtrics — commercial (paid), web/cloud – http://www.qualtrics.com/
• VTSurvey – opensource (free), hosted — http://vtsurvey.sourceforge.net/

Multiuser accounts

• Zoomerang offers multiuser accounts at the premium level (599$) http://www.zoomerang.com/signup/
• Qualtrics http://www.qualtrics.com/academicsolutions#AcademicFeatures
• Limesurvey (an example) http://docs.limesurvey.org/Central+participants+database+%28User+panel%29#User_Interface
• VTSurvey (demo is not working) http://vtsurvey.sourceforge.net/

Other

KwikSurveys http://www.kwiksurveys.com/