If there is one thing that Blackberry is hailed for, it would be the highly regarded instant messaging BBM service, a system that was less messaging and more like a live instant messaging on desktops. The concept is simple and replicated for iOS, Android and WP7 in the form of varying third party apps, which can free you from additional fees when all you want to do is chat...
First off, we like Ping Chat is a 100% free app which permits you to send data using both your phone network or via a wi-fi connection. We also like you're not limited to only text messaging, but can send video, photos, voice notes, or even locations to recipients. If you're one to chat with more than a single person at a time, you'll find the Groups feature useful forcoordinating and planning, while push notification ensures you never miss out on a chat update. Free
Kik Messenger doesn't discriminate, working natively on iOS, Android, Blackberry, and Windows Phone 7 devices for easy messaging duty. Texting on Kik is pretty fast...so fast, it feels like real-time instant messaging. Sending photos can also be sent one-on-one or shared to a larger group with a galleries option to share multiple images. Group chat is also available and the whole experience is free
What's App grabs contacts from your contacts list to find everyone with the same app so you can jump right in. Form and function come together for a messaging service that is eloquent in delivery. Create a profile, hop in or out like a live chat room with all your friends. Unlike the options above though, you'll have to pay a small fee: iOS - $1, Android/WP7 - Free for the first year/ $2 a year after
What can we say about Chat Plus other than it's got more options than a Swiss Army knife. The ability to handwrite messages, translate other languages, tweet or update Facebook, various personal aesthetic touches, and passcode protection for double the security...Chat Plus offers it all alongside group chat and multimedia messages. Free
Simplicity, style and devoted to the task describes Live Profile. We like how every inch of the screen is used without convoluting the UI. At a quick glance, users can check on status, group chat, address book scan, push notification, emotions, push notifications and unique pins. To get a sneak peak at who on your friends list is using their service, check the website for a list of your friends on Facebook. Free