We have a project, to create a Internal Messager for customer
It works like Whatsapp with all basic functions. Can chat with other staff by search / add Staff numbers, create group to talk, etc
It will work in Android, iPhone & Blackberry at least (Maybe a basic web base also if fit budget)
Please kindly provide us some more info and good if you have experiences. It may not upload to app store, or Play Store. Will send to staffs internally.