Caja is the official file manager for the MATE desktop. It allows one to browse directories, preview files and launch applications associated with them. It is also responsible for handling the icons on the MATE desktop. It works on local and remote filesystems.

Mono.Zeroconf is a cross platform Zero Configuration Networking library for Mono and .NET. It provides a unified API for performing the most common zeroconf operations on a variety of platforms and subsystems: all the operating systems supported by Mono and both the Avahi and Bonjour/mDNSResponder transports.

Privbind is a utility that allows running non-root applications, only giving them one root privilege - binding to low (<1024) ports. The aim is similar, though using a completely different method, to "authbind".

reConServer is the SIP conferencing server developed by the reSIProcate community. It provides a lightweight, easy to configure way to run multi-user SIP conferences. It supports audio but not video or text.