You can also look up for these other topics:
Framework
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CMS
Tool
Security
Hacktoberfest
Effective June 1, 2021: Phabricator is no longer actively maintained.
phacilityWordPress Packagist — manage your plugins with Composer
outlandishideasSource control integration plugin framework for MantisBT, including support for Github, Gitlab, Bitbucket, Gitweb, Cgit, Subversion, Mercurial and more
mantisbt-pluginsLightweight Docker image to build a container running an SVN server
elleFlorio