I was looking at making quick mock-ups. Came across this interesting little tool
I tried to create a simple mockup to explain my friend about creating a simple web-page layout. It just took me 5 minutes to do it and send the screenshot to him. (No more paper drawings, scanning it and emailing.)
No need of installing any new toolset, not high on memory, no need of expensive toolset like visio, etc.
What Visual Basic did for GUI programming will be what Balsamiq is for rapid prototyping.. I simply love this awesome tool. The below example just took me 2 minutes. Check this out for you to know to more about this tool.