Design fully interactive prototypes in no time
onfocus.in
They really moved prototyping to the next level.
onfocus.in
The thing about prototypes is that if they "look too good" the people who see it forget it's a prototype. Then you get bogged down in details like "why is that button so orange?!?" every time you show it off.
That's why low-fi prototyping tools like Balsamiq are so good... they help you create things that look like prototypes.
Anyway I liked them because it's very easy to create and share prototypes.
By the way you can create wireframes if you want to avoid that kind of comments.