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.
Connect with your favourite people.
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.
Quality voice communication via the Internet.
A simple, powerful, and secure messenger.
All-in-one voice and text chat for gamers that’s free, secure, and works on both your desktop and phone.
A chat program which lets you log in to accounts on multiple chat networks simultaneously.
Free, Open Source and Cross Platform messaging and emailing app that combines common web applications into one.
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 instant messaging application for communication over a local network.
A free messaging app for WhatsApp, Facebook Messenger, Telegram, Slack and more.
A pop up style LAN Messenger.
One messenger for Internet and LAN chat with end-to-end encryption.
Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.
Communicate freely with people over the internet, with voice, video, and text instant messaging.
An IRC client with multiserver support and a customizable interface.
Secure and independent communication, connected via Matrix.
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.
Chat with other users in the same subnet.
A fully-featured XMPP client.
Instantly ready to share and watch – at home, in the office, or a bit of both.
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.
One shared space for all your cross-functional work.
Secure E-Mail Client & Instant Messenger with Multi-Encryption.
The secure Slack/WhatsApp alternative for organizations handling regulated/sensitive data.