HexChat is an IRC client based on 
XChat for Linux , but unlike XChat it’s completely free for both Windows and Unix-like systems.
Cost / License
- Free
- Open Source
Application types
Platforms
- Windows
- Linux
- BSD
- PortableApps.com
- MacPorts
- XQuartz
Federated and open-source social network with no ads, 500-character limit, custom emojis, and content warnings, emphasizing privacy and personal interaction.
Cost / License
- Free
- Open Source
Application types
Platforms
- Online
- Android
- iPhone
- iPad
- Self-Hosted
- F-Droid
- Cloudron
- Android Tablet
+6
Matrix defines a set of open APIs for decentralised communication, suitable for securely publishing, persisting and subscribing to data over a global open federation of servers with no single point of control.
Cost / License
- Free
- Open Source
Application types
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Self-Hosted
- WebRTC
- Python
- JavaScript
- Go (Programming Language)
- Cloudron
- Java
- Perl
Cross-platform email client providing POP/IMAP support, robust filtering, multiple accounts, and chat. Extendable via add-ons with RSS/Atom, etc.
Cost / License
- Free
- Open Source
Application types
Platforms
- Mac
- Windows
- Linux
- Android
- BSD
- AppImageHub
- Snapcraft
- Flathub
- PortableApps.com
- F-Droid
- Haiku
- Homebrew
- Chocolatey
+8
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Gu