Dialog Messenger - handy and feature-rich enterprise multi-device messenger available for server or cloud – Slack-like, but not Slack-limited
Topia - Create amazing wallpapers for your iPhone
Ripcord - A desktop chat client for Discord and Slack
Gather Town - Spatial video-chat worlds for work and play
Ziggs - Smoothly Share Content Between Devices!
VRChat - Create and play in virtual worlds with others