HipChat

HipChat is group chat and IM – built exclusively for companies and teams. Collaborate in real-time with persistent rooms, painless file sharing, searchable chat history, and apps that run on everything. Hook up notifications from 40+ tools and services or build your own with the HipChat API. Since HipChat launched in 2010, it has become the chat tool loved by Quora, Instagram, Tumblr, and Wired. HipChat was acquired by Atlassian in 2012.