I am in the process of writing a survey for NOSI, which you will hear all about next week. I had originally done the survey in Surveymonkey, which is a slick on-line survey tool. But, a very nice soul at MayFirst/people-link, where we house the NOSI site, set up Limesurvey for us, so we're using that. Limesurvey is actually quite powerful. Like many free and open source software tools, it leans toward the powerful, flexible side, rather than the slick, easy to use side. So it has its challenges. The admin interface is nice looking, and fairly intuitive. The surveys could stand some graphic design help, but you can design templates for it. It's a LAMP stack application. Worth a look if your organization does surveys.