Nuages - Nuages is a collaborative meeting poll system..
Dialog Messenger - handy and feature-rich enterprise multi-device messenger available for server or cloud – Slack-like, but not Slack-limited
Framadate - Make your polls
Ripcord - A desktop chat client for Discord and Slack
FullCalendar - FullCalendar is an open-source JavaScript event calendar.
Ziggs - Smoothly Share Content Between Devices!