Indeed, see here: https://www.atlassian.com/partnerships/slack
"Atlassian + Slack
Atlassian and Slack have forged a new strategic partnership. We'll be discontinuing Hipchat and Stride, and are providing a migration path to Slack for all our customers."
I use Slack, I am not that happy with it, but does the job. At least, it has a beta Linux client. Too bad SourceTree is not available to Linux.
Discussion in general that pertains to Sabayon Linux - Must Pertain to Sabayon Linux