PUBLIC MARKS with tags collaborative & online

It's an open source server and client system for enterprise messaging and collaboration email, contacts, and group calendaring. It has open APIs and a lot of potential for mashups. I was very impressed, desktop type interface with filders and tags.

create diagrams and flow charts online. collaborative application letting you create a diagram, share it with others, work on it together, and publish when complete.

If you've ever been frustrated by an elusive fact in a book you just can't seem to get your hands on, Books We Own is for you. The more than 1,500 volunteers listed here will look up your ancestors in their home libraries—for free! Available resources are indexed by surname and locale, or try the new sitewide search.

collaborative genealogy site

Share Memories ~ Build Relationships The AncientFaces Community welcomes you to share your genealogy research and family history for free. Take this opportunity to Join the Community and begin your discovery.

Searches and submit acronymes in English, Spanishl, French, German, Dutch, Italian and Portuguese.

Instructables is a community for showing what you make and how others can make it. Making things is part of being human. Whether you make bikes, kites, food, clothing, protocols for biology research, or hack consumer electronics, good instructions are critical.

Think of it as the ultimate Search Blog Site or Wiki-search. Also, think of it as the ultimate Search Community site. A place for people of like interests to gather. PreFound.com can cut through the clutter that a typical Google search might return by add

Online collaborative whiteboard