GNU Mailutils is a rich and powerful protocol-independent mail framework. It contains a series of useful mail libraries, clients, and servers.

It is built using coroutines, allowing it to be completely asynchronous while remaining single threaded. It supports RFB protocols 3.3 through 3.8 and the VeNCrypt authentication extension providing SSL/TLS encryption with x509 certificate authentication.

Avahi is a fully LGPL framework for Multicast DNS Service Discovery. It allows programs to publish and discover services and hosts running on a local network with no specific configuration. For example you can plug into a network and instantly find printers to print to, files to look at and people to talk to.

The catdoc program reads one or more Microsoft Word files and outputs their contents to standard output as text.

Qemu Launcher provides a graphical front-end to all basic, and many advanced QEMU computer emulator options. It allows you to create, save, and run multiple virtual machine configurations, create and convert disk images.