A basic version of the Liturgy of the Hours using the public domain translation. Here's my initial calculations of how things would work:
"21 day rotation, 5 Hours a day, Office, Morning and Evening get 2 psalms, Midday and Night get 1
21 x 3 x 2=126
21 x 2 x 1=42
168, so 119 gets split into 19 parts I guess shrug"
In order to make it absolutely clear we're not trying to step on the USCCB's territory, we'll avoid parity with the LOTH as it stands. A 3 week cycle instead of a 4 week cycle, keeping Psalms in one piece (except for 119, that would be asking a lot), and for step 1, it will just be the psalms and the canticles.
And here's my outline for how to make this happen:
Step 1:
An offline useable group of html documents with the hours for each day:
-Nav page
--Week 1
---Sun
----Office
----Morning
----Midday
----Evening
----Night
---Mon
(etc...)
--Week 2
(etc...)
--Week 3
(etc...)
For this step we'll only include the Psalms and Morning, Evening, and Night prayer canticles.
Step 2:
Add readings
This will require some research, might look to pre-Vat II breviary or a monastic schedule to determine readings. Office in particular will be a difficult task.
Step 3:
Add Our Father to Morning and Evening, responsory, antiphons, invititory, petitions, and all other parts.
This might need to be broken into further steps. I'm hoping some public domain source will be found to make this part easier.