From Drupal and Moodle, right through to a Git versioning system and Perl modules on CPAN, we contribute back to over 175 community open source projects. This list is in order of the number of projects contributed to.
Benchw provides a toolset to benchmark the capabilities of several different database engines for data warehouse type activities. It is designed to provide a simple way to test data loading, index creation plus query performance in the spirit of TPC-H
An object-oriented library written in PHP that allows reading and writing iCalendar files. It is easy to use, fully standards compliant, and powerful. Intended audience: application developers who want to support iCalendar (RFC-2445, iCal).
adjacency matrix implementation using bitwise operations
Bizgres is a PostgreSQL "distribution", including experimental core mods, for an optimized Business Intelligence version
Booktype (formerly known as Booki) is the open source platform that helps people write and publish print and digital books. Booktype makes it easier for people and organisations to collate, organise, edit and publish books. Delivering frictionlessly to print, lulu.com and almost any ereader, Booktype facilitates collaborative production processes. No more lost manuscripts, overwritten Word files, awkward wikis or cumbersome CMSes. This project is related to https://www.ohloh.net/p/objavi
Btrfs kernelspace. Btrfs is a new copy on write filesystem for Linux aimed at implementing advanced features while focusing on fault tolerance, repair and easy administration. Initially developed by Oracle, Btrfs is licensed under the GPL and open for contribution from anyone. Linux has a wealth of filesystems to choose from, but we are facing a number of challenges with scaling to the large storage subsystems that are becoming common in today's data centers. Filesystems need to scale in their ability to address and manage large storage, and also in their ability to detect, repair and tolerate errors in the data stored on disk. Btrfs is under heavy development, and is not suitable for any uses other than benchmarking and review. The Btrfs disk format is not yet finalized.
Tool to find unused methods in a large C++ code base (e.g. LibreOffice) with no false positives.
caravel author identification (https://github.com/pan-webis-de/caravel)
An author identification system based on recur