I've seen regular use of grapple, disarm and trip. I've seen sunder but rarely from the player side. The cry of 'horray, I've sundered the +5 longsword! Now we've won, let's loot the body... oh.. um... sorry guys' always disuades me from sunder.
Bull rush and overrun, I understand but I don't think I've ever seen used. I guess I've never considered them that effective. Similarly I understand but have never seen Feint used, although I don't know why - I appreciate how effective that can be.
I've never played at high enough level for Mage's Disjunction to be an issue.
Others: Polymorph/Wild Shape I've not seen used in a while, I don't know that I know anyone that's tried keeping up with how it works since it seems to change every 5 mins.
There's a lot of spells I've never seen used more because of their ineffectiveness than anything else. I'm going to create an NPC wizard with a malicious use of Greater Mage Hand and Hold Portal one of these days. When I think of it.