Very easy to create simple forms (and has standard 'ready-to-use' forms) but you can take it as far as you want (or can, in my case) You even learn some PHP and Javascript following their on-site tutorials!

This is really full with functionality which makes it a little complicated to get started with, but once you get into it, you realize that this component is capable and well designed for almost anything you'd like it to do when it comes to forms. I especially have found useful the optional logging and the availablity of back end menu additions for administrative purposes. Lots to learn, but a very powerful tool.

This is a very useful extensions. It allows for the creation of a wide variety of forms and helps overcome the inherent limitations of the default Mambo forms. The learning curve can be a bit steep at the beginning, but once you get the hang of it, you will like it.