Redmine is #2 in Top 18 Issue Trackers
Redmine is a flexible alternative project management web application. Written using the Ruby on Rails framework, it is cross-platform and cross-database. Redmine is open source and released under the terms of the GNU General Public License v2 (GPL).
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#2 in Top 18 Issue Trackers
The best alternatives to Redmine are: JIRA, Gitlab, Mantis, Bugzilla, Trac, Asana, Trello
Latest news about Redmine
2014. Redmine 2.5 impoves custom fields
Redmine is a flexible project management web application written using Ruby on Rails framework. The new version - Redmine 2.5.0 is available for download. It brings many improvements to custom fields formats: text formatting support, HTTP link support, fine-grained selection for user and version custom fields based on roles and version status. The custom field format API was fully rewritten, so if you're running some plugins that deal with it (eg. that adds non standard field formats), you'll have to update them before upgrading. This version also introduces experimental support for Markdown formatting, a popular text formatting syntax.