5 card draw Classic. everyone should know this game (and it's the basis for the other poker games)
Midnight Baseball: 7 Card No peek w/ 3s & 9s wild and 4s will let you buy another card for a chip (bet on every player's high hand.)
Follow the Bitch (AKA Queen and what follows): 2 cards down 3 cards up w/ Queens and last card delt directly after a Queen (face up) are wild... (bet after 3rd, 4th and 5th cards are dealt)
Texas Hold'em: good game if there're more than 5 people.
Guts. 2-5 cards (dealer's choice) if there's less then 5 cards then straights and flushes don't count. Players bet then on count of three must hold or fold. If 1 player holds that player wins. If more than 1 player hold, then winner takes the pot, and losers pay the ammount that was in the pot to the new pot (progressive)
say there's a $5 ante and there're 4 players. that's a $20 pot. lets say that 3 players hold their cards. 1 person gets the $20, and the two that held and lost pay $20 each making the new pot $40.
(3 card guts is the best IMHO.)
and there's another great game that's not really a poker game: Screw your neighbor Each player places 4 piles of chips infront of themselves. Dealer then deals 1 card to each player. Ace is the lowest (1) and King is the Highest. Player on the Dealer's left starts and decides if he/she wants to heep the card dealt or trade with the player on his/her left. if the player wants to trade, then the player on the person's left must accept the trade UNLESS the person on the left has a King. then they may say "Screw you" to the person on their right 9who wants the trade) and the option to trade continues clockwise with each player to the dealer. the dealer then may keep the card in his hand or take the top card off the deck.
the person with the lowest card after the dealer makes his/her decision pushes one of their piles of chips into the center of the table. The deal passes to the left, and the deck is not shuffled until there are not enough cards left to make a full round.
Winner is the last person with chips, and they get them all.
there're more but some of the rules are too complex (like 7/27)