Mattermost

http://www.mattermost.org/

2015-12-31 10:57:22
Gitter — Where developers come to talk.

https://gitter.im/

2015-09-23 18:09:43
Crossbar.io Unified Application Router

http://crossbar.io/

2015-03-14 21:28:53
Queues

http://queues.io/

2014-06-09 14:43:53
RabbitMQ - Messaging that just works

http://www.rabbitmq.com/

2012-11-01 17:17:10