The MediaWiki Widgets extension allows adding widgets to the wiki by just creating a page in the Widget namespace.

UPX (the Ultimate Packer for eXecutables) is a free, portable, extendable, high-performance executable packer for several different executable formats. It achieves an excellent compression ratio and offers very fast decompression. Your executables suffer no memory overhead or other drawbacks because of in-place decompression....

GPSD is a translator and replicator daemon for GPS devices, AIS radios, and other navigational sensors. It understands NMEA and many vendor proprietary protocols, and outputs NMEA or a simple text protocol over TCP to an arbitrary number of clients.

Contact Manager for GNU Emacs with hooks for popular mail reading software such as VM, Gnus, and rmail.

OfflineIMAP is a bidirectional IMAP/Maildir synchronization tool aimed to augment your mail reader. With OfflineIMAP, you can read the same mailbox from multiple computers and have your changes (deletions, flags, etc.) be automatically reflected on all computers. It also lets you read mail offline (perhaps on a laptop) and synchronize all changes when you get connected again....

LibTorrent is a BitTorrent library written in C++ for *nix, with a focus on high performance and good code. The library differentiates itself from other implementations by transfering directly from file pages to the network stack. On high-bandwidth connections it is able to seed at 3 times the speed of the official client....

Knockout makes it easier to create rich, responsive UIs with JavaScript,

Nifty GUI is a Java Library that supports the building of interactive user interfaces for games or similar applications. It utilizes lwjgl for OpenGL rendering. The configuration of the GUI is stored in xml files with little supporting Java code. In short Nifty helps you to layout stuff, display it in a cool way and interact with it :)...

Spock is a testing and specification framework for Java and Groovy developers. What makes it stand out from the crowd is its beautiful and highly expressive specification language. Thanks to its JUnit runner, Spock is compatible with most IDEs, build tools, and continuous integration servers. Spock is inspired from JUnit, jMock, RSpec, Groovy, Scala, Vulcans, and other fascinating life forms....

HBase is the Hadoop database. Its an open-source, distributed, column-oriented store modeled after the Google paper, Bigtable: A Distributed Storeage System for Structured Data by Chang et al. Just as Bigtable leverages the distributed data storage provided by the Google File System, HBase provides Bigtable-like capabilities on top of Hadoop....