I know it says updated March 2016, but seems a bit out of date, given the references to Lync and especially Hall (seems to have been acquired by Atlassian in 2015 and rolled into HipChat[0])

[0]: https://www.crunchbase.com/organization/hall#/entity

Email + IRC + Mumble + Any combination of version control, bugtracker and wiki.

Why people pay for this kind of thing is beyond me.

"api" was just explaining that yesterday:

https://news.ycombinator.com/item?id=12140489

You may not work at a company, but for anything other than personal use, it is very easy to see why a homebrew IRC + Mumble solution is not going to work. I love open source as much as the next guy (and am waiting for Mattermost to incorporate E2E so I can switch my personal communications over to it), but it's a bit elitist to "not be able to imagine" why people would pay for a chat service.

Did not see the other comment before posting mine. api's comment linked below has a much better explanation.

1 - Bitrix24

2 - HipChat

3 - Hall

4 - Pie

5 - eXo Platform

6 - Yammer

7 - Microsoft Lync

8 - Skype

9 - Fuze

10 - glip

At my work "Lync" just updated to "Skype for Business". Is there even a difference?

Also, why the hell is IRC not on the list?

there is a difference - Skype for Business is buggy as HELL! Hundreds of our users (myself included) are always having problems with it

What's the best FOSS alternative or collection of components currently available? And that people like to use? ;)