Bluetooth Net Chat - This application is a Bluetooth messenger for your Android device. It provides a chat for two clients. Transfer messages without any costs for internet or sms, fast and free. There are no ads and no limitation
Nimbuzz - Free messages, Free Calls. Unlimited!
Nimbuzz Messenger combines the power of internet and smart phone messenger into one, and lets you make cheap international voice calls, send unlimited chat messages, share files on any mobile device across popular messengers. Nimbuzz Messenger is available on Android, iOS, Blackberry, Symbian, Java, Windows and Mac
WhatsApp is a smartphone messenger available for Android, BlackBerry, iPhone, Windows Phone and Nokia phones. WhatsApp uses your 3G or WiFi (when available) to message with friends and family. Switch from SMS to WhatsApp to send and receive messages, pictures, audio notes, and video messages. First year FREE! ($0
FunForMobile Ringtones & Chat - Share ringtone, wallpaper, joke, photo, video. Chat, talk, play games.
Make friends; Chat, Talk, Play; Download wallpaper, ringtone, video made by other members. Share jokes, photos, videos, and ringtones; Have fun at FunForMobile
TalkBox for Android - TalkBox is a mobile voice messenger which allows users to exchange, share and publish their voice messages in an unprecedented way
Palringo (Android) - Palringo is a popular mobile group messaging service with a large active community of over 300,000 social groups. Send instant text, picture, and voice (Push-to-Talk) messages to friends, groups of friends, social groups, or anyone on any mobile device, PC, or Mac
MSN (Windows Live Messenger or WLM) client with file transfer, voice clips etc.. MSN (Windows Live Messenger or WLM) client - Feedback is welcome! If you have a question, problem or suggestion press Menu, choose Help inside the app
XLive is a 3-in-1 Internet tool. It has an integrated RSS reader, multi-protocol messenger as well as email client with SSL support.
XLive features:
Chating withs friend using different protocols (ICQ, GTalk).
Reading news via RSS feeds.
Sending and reading e-mails via IMAP, POP3, SMTP and SSL protocols