TimeSite Pro - TimeSite Pro is a fully configurable, cloud-based time tracking, expense & invoicing solution.
Slack - A messaging app for teams who see through the Earth!
TimeSolv - Legal Time Tracking & Billing Software.
9mCollab - Collaborate (efficiently) Conclude (fast) Contribute (in the knowledge base)
WiseTime - Web-based automatic time tracking software
Mattermost - Mattermost is an open source alternative to Slack.