Firefox OS app for Liturgy of the Hours, see https://schnark.github.io/install.html?id=stundenbuch for more information.
Note that the folder l10n-source is not included for copyright reasons, if you know the password, you can re-generated these files with decrypt.html. If you don’t have the password, you might want to recreate these files from those in l10n-keys and the documentation in l10n-format.txt.
Note that this repository is managed as described in https://xkcd.com/1597/.