1. Ultimate IE6 Cheatsheet: How To Fix 25+ Internet Explorer 6 Bugs – This is not the first time anybody has attempted to put together a list of IE6 bugs, but no one has explained it so beautifully. Must bookmark for all web designers.
2. Choose Your Own HTML 5 Adventure: A collection of 5 interesting demos showcasing the goodness of HTML 5.
3. Digital Copyright Slider: An online tool that allows you to pick a date range using a slider and determine whether works published within that date range is under copyright and whether or not permission is required to republish it.
4. U.S. Legal Forms: Over 36,000 different legal documents and forms, including wills, name change, real estate etc. No free download though, needs to be bought.
5. Examville: A global online education community where users can students and teachers cane connect and interact with others from around the world. Examville provides live classes, conducts online tests, offers study aids, Q&A etc.
Pretty good list, I'd swap out http://www.DocBuilder.com for uslegalforms and maybe find something better than examville.