Helios Calendar
The Helios Calendar project was a continuation of the commercial version of Helios, but released as open-source.
About this repo
This archived repository contains branches for every release of Helios Calendar. All old releases contain bugs, some include known security issues that were fixed in subsequent releases.
Documentation
The Helios Calendar documentation is available in the repo wiki.
License
All code in the Helios Calendar repository is released under the GPL.