Handcent SMS is an awesome, free Android app, being part of the category Communication Apps with subcategory SMS & IM.
This multiuser friendly app allows its users to chat, video and voice call as well as group chat and share numerous photos
BlackBerry developed BBM as a full, feature-rich messaging platform for everyone. The app is available...
Hike Messenger is messaging app for iPhone that lets you chat for free with any other user of the service.
SOMA Messenger is an instant messaging app with two standout features: privacy, and high-quality voice and video calls for free.