I wonder if there's a well designed and tested, working - and, of course, unofficial (?) - adaptation of Skyrim's Dragon Shouts (Thu'um) to DnD 3.x (or possibly Pathfinder)?
If not, how would you adapt them?
For a really straight translation of the Skyrim mechanics, you could model those monoliths that have the words of power on them as Magical Locations (Dungeon Master’s Guide II) or Legendary Locations (Complete Scoundrel). They therefore grant you the ability to use these shouts (probably Supernatural abilities), and they cost you some of your Wealth-by-Level as if they were items.
Then you could take the D&D Dragon’s mechanics for their breath weapons, giving them cool downs.
For example, Fus could be as follows:
Then you can let them find these places, and either pay for them, or just let them have them free (or give them a separate “wealth” just for these).
And then Ro and Dah can have prerequisites of knowing Fus and then of knowing Fus and Ro, and improve upon Fus’s effect while extending the cooldown. I think 1d4, +1 per additional word, is probably fair for most effects, though some with long durations should have long cooldowns.
See the Metabreath feats from Draconomicon for more ideas on extending/empowering breath weapons. I’ve explicitly made Fus a breath weapon, so it can take advantage of these.
Not an exact duplicate, but the Dracolexi from Races of the Dragon gets to use Draconic Words of Power as spell-like abilities or augments to their spells, which is more or less what the shouts in Skyrim were.
OK, I’ve found a whole bunch of homebrew, none of which I’ve read, so I can’t tell you how good any of this is. Most of them are either base classes with new systems, extensions or modifications to the Truenaming system of Tome of Magic, or a new martial discipline à la Tome of Battle.
None of these are exactly what you want, but it’s the best I can find. You can probably pretty easily make these “add-on” by giving the bonus feats for free or giving free access to the maneuvers, or something like that.
I don't think there is, have had no success looking for Skyrim SRD or Tamriel SRD on google. I'm also thinking in playing a campaign based on Tamriel world.
I think you could based the Thu'ums area and damage on dragons breath powers. Maybe let 3 feats available to the characters, representing three words of power.
I would use by pre-requisite:
Each of the words could augment the effects, depending oh the shout, like increased damage, range, duration, and etc.