Top 8 Chat apps that are similar to ooVoo for Mac
X (Twitter)
FreeOverview of X (Twitter) App Features
MacProteus
Freeinstant messaging client for most major IM services
Mac
AOL Desktop for Mac
FreeAll-in-one AOL client with integrated mail, AIM, browser.
MacApple Messages
FreeDownload Messages Beta and get a taste of what's coming in OS X Mountain Lion. When you install Messages, it replaces iChat. But iChat services will continue to work.
Mac
WhatsApp
FreeWhatsApp app on your Mac
MacTwitch
FreeMac
Telegram
FreeChat in private and group chats, share photos and videos and stay connected with everyone at once.
MacZoom Meetings
FreeHigh-Quality Video Conferencing with Zoom Meetings
Mac
