This site is awesome. You can look up the liturgy of the hours for today, and any day in the near future by clicking the "tomorrow" link, then finding a date using the URL schema:

http://divineoffice.org/?date=YYYYMMDD

Of course, you'd want to at least do a spot check with the text to a breviary, but every time I've used it, it's been very accurate.

Scribus is great. It's a FREE professional level typesetting system. A wee bit buggy, but that's fine with me. Just save frequently, don't chain too many text boxes together, and you'll be fine.

There's a little bit more of a learning curve, but if you are fairly techey (like me), you shouldn't have too much trouble. Just keep playing with it, it'll pay off in the long run (it's what I used for my book on the universal prayer, see sample below). Combined with the meinrad fonts (see below), you can do awesome things with scribus. I did a 70 page book recently with it (here's a sample)). It's amazing.

You can make wonderful aids like this, which I eventually downsize, and print on a single folded 8.5 x 11.

Whatever typesetting program you use, the meinrad fonts will be very helpful to you, for both neumes and modern notation, including stemless and stemmed. Also a little learning curve, but it's not bad.

Finally, if you're not fimilair with chanted LOTH, I'd check out a copy of the Mundelein Psalter. You can easily reproduce offices from the Mundelein into worship aids, such as in my link above, using the meinrad fonts and a typesetting program.

Another great advantage of these fonts is the ease. Of course, you could break out gregorio or finale to do all your music, but do you really want to do that for the single clef and 5 notes needed for a psalm tone? Everything can be kept right in the document this way.

I know scribus directly supports tex and gregorio, which could be a great option, particularly if you're planning on using scribus already. Gregorio has such a wonderful output. I'll have to try this sometime and post on how it goes.