OpenDMS.NET lets you implement a document management system into a project of your own or as a stand-alone DMS. The API is based on HTTP, so clients are fairly straightforward to develop.
OFFSystem is a P2P-based online storage system.
You can upload a file to it, turn off your
computer, and download the file off the network a
few weeks later with another machine. The system
does not rely on a central owner.
A comprehensive tutorial and reference on shell scripting using Bash.
An image batch converter and resizer with advanced features.