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.
All-in-one voice and text chat for gamers that’s free, secure, and works on both your desktop and phone.
A simple, powerful, and secure messenger.
A chat program which lets you log in to accounts on multiple chat networks simultaneously.
Quality voice communication via the Internet.
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.
An easy-to-use LAN messaging application for safe, secure and effective intra-office communication.
An open source, peer to peer, LAN messenger.
One messenger for Internet and LAN chat with end-to-end encryption.
A free instant messaging application for communication over a local network.
An IRC client with multiserver support and a customizable interface.
Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.
Secure and independent communication, connected via Matrix.
A free messaging app for WhatsApp, Facebook Messenger, Telegram, Slack and more.
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.
Chat with other users in the same subnet.
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.
A free encrypted messaging app that allows users to send and receive secure messages, documents, pictures, videos and audio files.
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.
A pop up style LAN Messenger.