Get flash to fully experience Pearltrees
The open source model has, over the last 20 years, proven that collaborative development is one of the best ways to incorporate the newest ideas and latest concepts into design.
All layouts use valid markup and CSS, and have been tested successfully on Internet Explorer/win 5.0, 5.5, 6 and beta 2 preview of version 7; Opera 8.5, Firefox 1.5 and Safari 2. Each of the columns could be the longest, and for testing columns length I've used the script filler text on demand . Each layout could represent a site with five main sections: header, content, navigation, other stuff and footer.