This is the jekyll site that generates https://psalter.app/, a simple static text-only psalter, including pages for the Kathisma groupings used by the Orthodox Church.
The text of this psalter is from the Brenton translation of the Septuagint, LXX2012 (and update to Brenton's with modern American English) and the KJV. All three translations are in the public domain.
The text is sourced from the USFX format available from https://ebible.org/ (see the _xml directory), with a typescript script to extract just the text to YAML (into the _data directory). That data is then used by the jekyll pages/layouts to provide a clean, distraction-free interface to read individual psalms or the kathismata.