SABnzbd - SABnzbd is a free/open-source cross-platform binary newsreader written in Python.

StableBit DrivePool - State of the art, file based drive pooling software.

NZBGet - The most efficient usenet downloader.

Greyhole - Greyhole is an application that uses Samba to create a storage pool of all your available hard drives, and allows you to create redundant copies of the files you store, in order to prevent data loss when part of your hardware fails.

GrabIt - GrabIt is a free application that enables you to easily find and download content from Usenet news...

mhddfs - The driver combines a several mount points into the single one.