One advantage with 123Forms is that it uses are endless. You can use it for many kind of forms: expense report, survey, order forms, reservation forms, employment application, financial advisor, ROI-calculator, engineering. In many cases specialized tools are not needed.
Contact
forms: A contact form can contain much more than just subject, email and
message. By creating a specialized form for your customers, the request
you get are more complete and easier to handle.
(Click for example.)
Employment
application
Fault reporting, bug reporting,
error reporting
Surveys
Order
forms, reservation forms: Immediate feedback to the customer with totals
and validation that the order is complete and that all necessary items
are ordered
Quote
generation: Give the user an immediate quote on the web. The submit
button is optional and if the user presses it, your sales people can
contact the prospect.
Education:
self-test exercises. Let the user answer questions, and give immediate
feedback
The submit button is optional. Sometimes you might want to create a form where the user can play with what-if-scenarios.
Financial advisors:
Let the user test and show the financial outcome
Return-on-investment calculators
(ROI):
Are you selling a product, why not let the user calculate the financial benefits online?
Engineering:
Help the user with technical calculations online