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.
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.
A simple, powerful, and secure messenger.
Free, Open Source and Cross Platform messaging and emailing app that combines common web applications into one.
A free instant messaging application for communication over a local network.
Communicate freely with people over the internet, with voice, video, and text instant messaging.
An open source, peer to peer, LAN messenger.
An IRC client with multiserver support and a customizable interface.
One messenger for Internet and LAN chat with end-to-end encryption.
An easy-to-use LAN messaging application for safe, secure and effective intra-office communication.
A pop up style LAN Messenger.
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.
Secure and independent communication, connected via Matrix.
A fully-featured XMPP client.
Chat with other users in the same subnet.
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.
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.
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.