Ask HN: Collaboration software for teams

What I need:

* A place to save and edit documents (without exporting them). Word .doc format support would be welcome, but I realize it might not be realistic. Version control would be good.

* A forum or chat like feature to interact with team members.

* A link resource functionality to save and organize bookmarks.

What are my options? Campfire is what I've looked into so far. Slack also looks interesting, but quite focused on the messaging experience.