FormstackPerhaps the most feature-rich environment for extending or interfacing with other platforms and languages. Formstack also purports to support output and download of form data in MS Word format (in addition to the other more commonly available formats like CSV, Excel.
Form Site
A very well-developed offering which stands up well against the Formstack service, with a few missing features like ability to format form data into MS Word documents. Formsite's pricing is somewhat friendlier than Formstack with a budget package for $9.95 per month which includes 5 forms, 250 MB of storage and up to 500 form submissions per month. (pricing information last verified February 3, 2011).
Formnut pretty much beats out all the competition when it comes to price, but loses on a range of features which are not available with this service. A serious consideration for the budget-conscious who just want to get a simple, but secure, online form operating in a short period of time.
Honorable mentions and html form reference materials:
- Secure Form - Easy to use Secure Web Form Builder
- Html contact form with captcha
- Form Architect - "formArchitect automates the most time-consuming and error-prone aspects of form design, saving you not only design time but bug hunting time as well".