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!
Connect with your favourite people.
Quality voice communication via the Internet.
All-in-one voice and text chat for gamers that’s free, secure, and works on both your desktop and phone.
Skype keeps the world talking. Call, message and share whatever you want for free.
A chat program which lets you log in to accounts on multiple chat networks simultaneously.
Exchange free instant messages with friends whenever and wherever with one-on-one and group chats.
An open source, peer to peer, LAN messenger.
A free instant messaging application for communication over a local network.
All your chats in one app
Secure and independent communication, connected via Matrix.
Free, Open Source and Cross Platform messaging and emailing app that combines common web applications into one.
A pop up style LAN Messenger.
Communicate freely with people over the internet, with voice, video, and text instant messaging.
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.
An IRC client with multiserver support and a customizable interface.
A free messaging app for WhatsApp, Facebook Messenger, Telegram, Slack and more.
An easy-to-use LAN messaging application for safe, secure and effective intra-office communication.
A fully-featured XMPP client.
The secure Slack/WhatsApp alternative for organizations handling regulated/sensitive data.
Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.
An open source SoftPhone, Video Conferencing and Instant Messenger application over the Internet.
One shared space for all your cross-functional work.
Secure E-Mail Client & Instant Messenger with Multi-Encryption.