Hi friends.. can you please suggest the best Android real time chat app with one to one and forum chats..with capability of file/photo/video sharing

Hi friends..

can you please suggest the best Android real time chat app with one to one and forum chats..with capability of file/photo/video sharing please,.

i need to run this simultaniously on my website as well as so that the same user data and chats can be populated on website as well as APP via JSON /XML query realtime..

thanks for your kind help

vivek