Top 8 Chat apps that are similar to ooVoo for Mac

Colloquy
Trial versionColloquy: A Feature-Rich IRC Client for Mac
Mac
Zoom
FreeComprehensive Overview of Zoom for Mac
Mac
Telegram
FreeComprehensive Features of Telegram for Mac
Mac
Proteus
Trial versionMulti-Protocol Chat Client for Mac Users
Mac
X (Twitter)
FreeOverview of X (Twitter) App Features
Mac
Facebook Desktop
FreeFacebook Desktop? More like Facebook Dust. Don't bother.
Mac
EOS Webcam Utility
FreeTransform Your Camera into a Webcam
Mac
Station
FreeEfficient Chat Management with Station
Mac