# Criteria Each listed software has to meet following criteria: 1. Licensed as *Free and Open Source Software* 1. Source code available 1. Keeps Privacy – No Advertisement, no Spyware! 1. No proprietary elements 1. Stable (at least stable to use) – *(if possible)* 1. Actively developed, maintained or supported – *(if possible)* 1. Documentation available (Project website etc.) 1. Free of charge F-Droid provides good [guidance](https://f-droid.org/docs/Anti-Features/) on *Anti-Features*. If the packages is available on [**F-Droid**](https://f-droid.org/) it can be linked using the `https://f-droid.org/app/` URL. If not yet, it's a good idea to promote F-Droid submission to the projects developer. Please do not submit third party F-Droid repositories. Entries are sorted alphabetically.