WhatsApp Messenger is a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS. WhatsApp Messenger is available for iPhone, BlackBerry, Android, Windows Phone and Nokia and yes, those phones can all message each other! Because WhatsApp Messenger uses the same internet data plan that you use for email and web browsing, there is no cost to message and stay in touch with your friends.
tags: built-in-file-transfer chat-clients contacts-integration encrypted-chat end-to-end-encryptionWith Viber, everyone in the world can connect. Freely. More than 460 million Viber users text, make HD-quality phone and video calls, and send photo and video messages worldwide over WiFi or 3G - for free. Viber Out can be used to make calls to non-Viber landlines and mobile numbers at low rates. Viber is available for many smartphones and platforms.
tags: free-calls group-chat hd-graphics multi-language phone-callsFacebook Messenger is a faster way to message. Reach friends right on their phones, get and send messages fast, message everyone at once and more.
tags: chat-clients facebook-client facebook-messaging group-chat smartphone-messagingWith ooVoo you can make free, high-quality video calls, voice calls, and send text messages to easily connect with your friends and family. Make clear and crisp video calls with up to 12 people at a time, on any device. Try it now!
tags: call-recording desktop-sharing group-chat video-calling video-chatZulip is a group chat app.
tags: chat-servers github-integration group-chat group-collaboration integrated-file-sharingPrivate instant messaging via secure, distributed technology.
tags: free-calls phone-calls self-destructing-messages smartphone-messaging voice-callZello (formerly loudtalks) the fastest way to communicate online. Don't type or call — just push F7 and speak! Reply, when convenient, talk to all people in a group at once or anyone individually, re-play the entire conversation later from voice history. It works on Blackberry, iPhone, Android and Windows Mobile devices too.
tags: communications instant-messaging lightweight multi-language push-notiications