Annotation tools: Nathan Hall | TELT | Scoop.it

Shona Whyte:

A variety of online collaborative tools for sharing weblinks, marking up documents, and doing other things you can do with interactive whiteboards.

 

See also Nik Peachey's writing tools

http://meaki.com/collections/a9b6f903f7c44952825af2ce4f0b35d5#.T9t9zsgN4Zg.netvibes

 

and Kelly Walsh's (older, but updated) post on online interactive whiteboards

http://www.emergingedtech.com/2010/04/6-free-online-interactive-white-boards/