for Mac OS X
We are pleased to present Scapple, a new tool for thinkers and writers of all stripes. Develop ideas intuitively by writing anywhere on a limitless virtual sheet of paper. It's as easy to use as a napkin and a pen, and doesn't force you to work under any kind of imposed structure.
Check out the free trial, head over to the Scapple home page or buy it now for 14.99 USD.