DAEMON Tools Lite enables you to emulate up to 4 CD / DVD / HDD virtual drives on your PC. Virtual drives will appear in your OS just like real ones.
A set of free software userspace tools for Linux that allow system administrators to interact with the Connection Tracking System.
Music Player Daemon is a jukebox server that controls music playback (MP3, Ogg, Flac, AAC, Mod, wave).
IPsec-Tools is a Linux port of the user-space tools from KAME.
SLAD is a tool for performing local security checks against GNU/Linux systems.
TheWall is a collection of tools for various platforms that provides NAT and firewall services for a small network.
Portable handler daemon with some nice tools to handle all ARP aspects