Are there any 3rd party chatting apps available for android,BB and iPhone?

I have a client who has a requirement for a chatting app. This开发者_JS百科 app should make communication possible on Android and Blackberry.

Wonder if this is technically feasible? If yes then how? Any clue?

Check out WhatsApp—you can send text, pics and more.

Yes, all you need is a chat server and clients on both mobile devices that utilize the server. All these frameworks support web services, so its quite easy to create a web-service to handle this on the server for you.

You can probably skip the server and let them talk directly to each other.

If you are looking for a technique to build three apps that can chat with each other regardless of phone OS this surely can be done.

You need to look for a chatting standard that is covered with libraries for all the three systems. I would look into Jabber/XMPP. It is the most commonly used open standard for submitting messages and at least for Android there is the Smack library that will run on Android and give you all the necessary functionality. I don't know which libraries can be used on iPhone or BB but there should be something available at least on the iPhone.