The Arakhnê.org Foundation Classes (AFC) is a collection of Java libraries (based on Maven) that provides a collection of utilities that are not provided in the standard Java API. Many utility classes are provided: file filters, progress indicators, arrays, collections, VM utilities, text utilities, math tools (point, vector, matrix, shape, etc.), widgets for AWT, Swing, and Android, a platform-independent graphical API, and more.
JWPL is a language independent, database-driven, high performance Wikipedia API that provides structured access to information nuggets like redirects, categories, articles, and link structure. It contains a Mediawiki Markup parser that can be used to further analyze the contents of a Wikipedia page or standalone with other text, TimeMachine, which reconstructs a snapshot of Wikipedia from a specific date, or multiple snapshots from a time span, and RevisionMachine, which offers efficient access to the history of articles using a dedicated storage format which decreases storage space by 98%. This enables random access to the whole revision history without requiring several terabytes of storage for a single Wikipedia dump.
jWatchdog delivers a simple watchdog to actively monitor your infrastructure and send you notifications in case something goes wrong. It is configured using a simple XML configuration file. This configuration file can be changed on-the-fly without a need to restart the watchdog. jWatchdog does not offer data collection itself. It assumes that you already collected the data on which you want to run jWatchdog. The de facto standard tool Collectd is recommended for data collection. jWatchdog assumes that you use the RRDTool collectd output plugin to store the collected data in RRD files, or use Graphite as a datasource.