WinSCP ... is an open source SFTP (SSH File Transfer Protocol) and SCP (Secure CoPy?) client for Windows using SSH (Secure SHell). Its main function is safe copying of files between a local and a remote computer. Beyond this basic function, WinSCP? manages some other actions with files.
CDex ... is a tool to do all sorts of things audio related. Mainly focused on ripping and converting, things like turning your home Compact Disc collection into an mp3 collection on your hard drive become extremely easy. With built in support for many encoders you wont find any shortage of options for your media files. Below is a more in-depth explination of CDex features. See also the CDex Feature List
NasBackup ... is an open source backup solution. It is a high-performance, enterprise-grade system for backing up MS Windows desktop PCs, laptops and servers to network disks. NasBackup? is a highly configurable solution and easy to install and maintain. NasBackup? is a backup solution that can replace traditional tape backup. The information is backed up to network storage using the rsync utility in a way that only the file differences are sent over the network.
Cooperative Linux ... is the first working free and open source method for optimally running Linux on Microsoft Windows natively. More generally, Cooperative Linux (short-named coLinux) is a port of the Linux kernel that allows it to run cooperatively alongside another operating system on a single machine. For instance, it allows one to freely run Linux on Windows 2000/XP, without using a commercial PC virtualization software such as VMware, in a way which is much more optimal than using any general purpose PC virtualization software.