I realized that I haven't updated the list in a while about progress on the Open Siddur client application, which runs at
http://app.opensiddur.org .
There are still some outstanding things that the app doesn't do or doesn't do well. Major examples are that the UI for entering conditional application of texts is incomplete and the outline view does not yet handle translations.
Some parts are ready for use by anyone interested, particularly anyone interested in testing the process for addition and editing of texts.
Happy Hanukkah,
Efraim