Chart, Diagram, and Flowchart Tools
Requirements:
- Infinitely scalable: users and number of documents
- Realtime, cloud, embeddable, automatically updating
Evaluating:
- http://www.jgraph.com/index.html and https://www.draw.io/?fileId=0B7pE5Y9PpJCXbEFMSGphM21xWFU - does not appear to have collaborative online feature in free version.
- http://www.lovelycharts.com/ - only premium appears to have collaborative feature
- http://flowchart.com/ - requested join invitation
- https://bubbl.us/ - team is paid; not clear if team is realtime collaborative
- https://cacoo.com/ - only 25 users
- Lucid chart - [1] - not free for collab
- http://www.yworks.com/en/products_yed_about.htm - appears open, but it is not clear if cloud collaborative feature exists