Mumble - Mumble is an open source, low-latency, high quality voice chat software primarily intended for use...

Weekdone - Market leader and innovator since 2013. Set structured quarterly goals, keep track of activities, and focus on getting real business results. Track weekly progress, provide feedback, and move everyone in a unified direction.

Discord - Step up your game with a modern voice & text chat app. Crystal clear voice, multiple server and channel support, mobile apps, and more.

Quantive - The best platform for turning strategy into results.

RaidCall - Free & Light. Setting up is fast and easy; with no need to rent or set up servers. Low CPU usage and minimum memory footprint allows for smooth, uninterrupted communication. im. Group Communication.

Workboard - Workboard is a performance and productivity app managers use with their teams to share goals, priorities, actions and feedback.