A few that haven't been mentioned.

"Dots" 7 card stud only the person with the most dots down the center of thier cards gets half the pot. For example a 3 is 3 dots, a 10 is 2 dots, a face card/4/6 is zero dots, Ace is 1 dot.

"Tropical dots" Same as dots only spades count all the dots on the card. (as some cards are different, always assume 10 dots for the Ts or 6 dots for the 6s)

"Ped" Each person gets 5 cards. There is a flop, turn, and river, and like in Omaha you must use 3 on the board and 2 in your hand. Hi/Lo split with NO qualifier.

"fake nickel" 7 card stud, all black 5's and the card following the last face up black 5 is wild. K of hearts face up kills the black 5's (any hand with a black 5 must be folded), but does not kill any wild card that followed a black 5. The low diamond in the hole (the real money) takes half the pot. The only final twist is that if one player has the three K's (natural) in their down cards they are royalty and take the entire pot. (this has only happened once in all the times I've played this game)