I found a free survey application called NSurvey. It’s a free ASP.NET survey application written in .NET. Here’s the official list of features:
- User friendly web based administration interface.
- Unlimited paging support
- Page navigation (previous / next)
- Survey progress can be saved and resumed later
- Value piping from query, session, cookie or server variables
- Client (javascript) & server side field validity checks (Numeric, dates etc...)
- Receive an email report after each entry completion
- Single or matrix question layouts
- Flexible form engine allowing you to create almost any form
- Extensible security addins architecture (click here for a schema)
- Cookie and IP security addins to prevent double submissions
- ASP.net context security addin (Forms , Windows authentication etc...)
- Restrict survey entry on email code using the email code security addin
- XML answer "feeder" (eg: countries, us states ...)
- Specify a maximum / minimum answers required for each question
- Email invitations
- Full multi-language support
- Conditional question branching logic
- Reports filtering through custom rules
- Editable detailed individual vote reports
- Opening / closing date
- Scored surveys to create tests, quizzes
- Protect your survey with a password security addin or a "thank you" message
- Custom redirection URL at the end of the survey
- Customizable design with visual studio / webmatrix designer support
- Open API
- Last but not least ... It's free!
It’s definitely better than writing your own.