what is the best FREE mockup tool for web applications?
I know balsamiq, which is really nice, but lacks the feature of linking different pages together.
I would like to do some kind of prototyping, so not just mocking a view, but also providing interaction between the mockups.
Which tool could I start with?
I think exhibit from mit csail is a good choice.
http://simile-widgets.org/exhibit/
You can load your data from javascript and simulate interaction with jquery and/or passing actions through URL parameters.