UniPKG (Universal PaCkaGe manager) is a modular package manager. It supports the RPM, deb, Slackware TGZ, and ArchLinux package formats, and doesn't depend on any of the distribution tools or libraries. It is completely self-sufficient, as formats such as cpio or tar are reimplemented.
Perlpodder is a tool similar to iPodder that downloads RSS2 enclosures as subscriptions or based on a keywords search in the tag. It can run as a cron job, searches for your MP3 player's mount point, and downloads all the podcasts on your list. It keeps a list of podcasts that have been already downloaded.
cpm (Console Password Manager) is a small console tool to manage passwords and other sensitive data and store them in a public-key encrypted file. It also allows you to configure the whole hierarchy yourself, so it's easily adoptable for many requirements. The encryption is handled through GnuPG, and the data inside is stored as XML.
The Compound XML Document Editor, an Eclipse plug-in, provides for the creation, directed editing, and serialization of documents such as XHTML, XForms, XML Events, Scalable Vector Graphics (SVG), VoiceXML, and MathML. It uses Eclipse Modeling Framework (EMF) models to define the semantics of constructing documents spanning one or more namespace. Those semantics include the order and placement of elements, the allowable child elements, and available attributes for each element.
Sysmask is a security package for Linux systems that can prevent arbitrary malicious codes from causing permanent damage. It protects the system against daemon exploits and user accounts against viruses and worms, whether known or unknown, without requiring the recompilation of existing software.