rock - no, not a tight player, but a mandatory straddle by the winner of the previous pot. eg. 2/5 PLO w/ rock
Dramaha (aka drawmaha) - 6-max split-pot mix-game of 5C draw and 5C omaha (Big O). Plays like a normal community game except on the flop where live players draw cards after betting is complete. At showdown, 1/2 pot goes to best Omaha hand, 1/2 pot to best hand in the hole.
Sviten (aka Sviten Special) - a variant of Dramaha. On the flop draw, any player that only draws 1 card is dealt that card face up. They can accept it otherwise they are dealt a card face down.
Archie - possibly invented in Phoenix AZ and named after a player who lost a lot of money playing the game. 6-max TD H/L split, 99 high qual, 8 low qual (Kansas City rules, ie. A-5. Thus low can scoop, and if no qualifying hands, pot is split.
Of course in Australia, you're unlikely to see anything other than NLH, LH or PLO played for cash.