I have a list of favorite startups here: https://www.are.na/morgan-sutherland/good-startups

Highlights:

http://are.na (private and collaborative research platform)

http://un1verse.co (mobile card-based programming)

https://www.notion.so (powerful collaborative documents)

http://mine.nyc (z-axis for content on the web)

http://ascribe.io (registering content ownership in the blockchain)

http://urbit.org (radically simple complete re-write of system and network software/infrastructure)

https://artadvisor.io/ (artworld intelligence)

https://graphcommons.com/ (collaborative graph databases)