The only ones my company uses that haven't yet been mentioned are Google Hangout and GoToMeeting. We use both because Hangouts have given us issues on some netw

The only ones my company uses that haven't yet been mentioned are Google Hangout and GoToMeeting. We use both because Hangouts have given us issues on some networks. Also, our chatbot is critical to the way we work and lives on hipchat (but has adapters for campfire and jabber): https://github.com/markolson/linkbot https://github.com/markolson/linkbot