The Consolidated Lists published by WotC on the (now mostly defunct) archive sitearchive site contained among other things a complete list of all published (by WotC) feats with names, sources, and short descriptions. As such, the lists do not contain any Dragon, Dungeon, or official site feats. Despite that, the list contains 3276 results (including duplicates from multiple sources).
A brief keyword search of " rag" turns up every instance of rage, rages, and raging. (Note that the inclusion of the space in the words is deliberate and removed words like courage and leverage from the results.) 65 results in total using this search.
A few results from the list that might apply:
- Thundering rage (EL)(deafen foes),
- Wolverine's rage (CD)(rage not on your turn),
- Righteous wrath (BE)(add divine),
- Poltergeist rage (Gh)(weak artillery),
- Mighty rage (EL)(boost rage) ,
- Terrifying rage (DMG & EL)(panic opponents)
- ...and especially Stone rage (RS) which is explicitly of a boost defense nature!
(These lists can also found via the well known wayback machine... and in my 3.x official sites archive.)