Open Source Software Library

Koha is the world's first free and open-source integrated library system. Canadian public and academic libraries have been among its largest adopters and contributors, with Canadian companies providing support and development.

Pidgin is a free and open-source multi-protocol instant messaging client. Canadian open-source developers have long been contributors to Pidgin and its underlying libpurple library, which supports dozens of chat protocols.

Client library for accessing D-Wave cloud solvers.

Ruby payment abstraction library used by ecommerce applications.

Ruby boot-time optimizer and cache library.

Drag-and-drop JavaScript library.

Go client library for Apache Kafka.

Orekit is a low level space dynamics library written in Java. Orekit is designed to be easily used in very different contexts, from quick studies up to critical operations. As a library, Orekit provides basic elements (orbits, dates, attitude, frames, ...) and various algorithms to handle them (conversions, propagations, pointing, events detection, orbit determination ...).

Mailmunge is a mail filter based on the Sendmail Milter filtering protocol and library. This protocol is used by both Sendmail and Postfix, allowing Mailmunge to work with either Postfix or Sendmail. Mailmunge connects the Milter protocol to a set of Perl worker processes. This lets you write your mail filtering policies in Perl, and make use of the wealth of CPAN modules available for dealing with MIME and email in general.

Beets is an open-source software project focused on music, metadata, library. It can be evaluated as a transparent, community-developed alternative for individuals, organizations, and technical teams.