kahun/awesome-sysadmin — pull request #154 by jancborchardt (2014-06-30 23:05:32+00:00)
Title: remove Rainloop as it is not open source

Rainloop uses a Creative Commons license with non-commercial clause: http://rainloop.net/licensing/ – unfortunately.

That makes it not open source. The developers don’t seem to plan on changing it, see https://github.com/RainLoop/rainloop-webmail/issues/8