A cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS.
A messaging app with a focus on speed and security.
Lets you send free messages as well as make free calls to other Viber users, on any device and network, in any country!
Skype keeps the world talking. Call, message and share whatever you want for free.
Exchange free instant messages with friends whenever and wherever with one-on-one and group chats.
A simple, powerful, and secure messenger.
Quality voice communication via the Internet.
A chat program which lets you log in to accounts on multiple chat networks simultaneously.
All-in-one voice and text chat for gamers that’s free, secure, and works on both your desktop and phone.
Free, Open Source and Cross Platform messaging and emailing app that combines common web applications into one.
Communicate freely with people over the internet, with voice, video, and text instant messaging.
A free instant messaging application for communication over a local network.
Chat with other users in the same subnet.
A pop up style LAN Messenger.
An open source, peer to peer, LAN messenger.
An easy-to-use LAN messaging application for safe, secure and effective intra-office communication.
A free messaging app for WhatsApp, Facebook Messenger, Telegram, Slack and more.
Instantly ready to share and watch – at home, in the office, or a bit of both.
A fully-featured XMPP client.
A popular Internet Relay Chat client used by millions of people, and thousands of organizations, to communicate, share, play and work with each other on IRC networks around the world.
One shared space for all your cross-functional work.
Chat with other Trillian users or those on Facebook, Google, AIM, ICQ, XMPP, Yahoo!, Twitter, and more.
An end-to-end encrypted messenger that minimises sensitive metadata, designed and built for people who want absolute privacy and freedom from any form of surveillance.
Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.
A free encrypted messaging app that allows users to send and receive secure messages, documents, pictures, videos and audio files.
An IRC client with multiserver support and a customizable interface.
Secure and independent communication, connected via Matrix.
One messenger for Internet and LAN chat with end-to-end encryption.
The secure Slack/WhatsApp alternative for organizations handling regulated/sensitive data.