The Joopita IBS is a suite of tools for businesses, organisations, and institutions. It improves your internal communications and allows you to manage contacts, todo lists, calendars, and more.
Zentyal Server aims at offering small and medium businesses (SMBs) a native drop-in replacement for Windows Small Business Server and Microsoft Exchange Server which can be set up in less than 30 minutes and is both easy to use and affordable.
A microcontroller assembler.
An easy to use, but still quite capable firewall for Netfilter/iptables.