Most of the poker games offered online are Texas Hold'em poker games. The reason is that this is the most popular variant of poker. No limits Hold'em is the most common option. However, you will also find Pot-limit and limited at all good providers. On the majority of poker sites you'll also find Omaha and Omaha Hi/Lo games with three different limit options. Some less known variants, as a rule, exist only on major and open Chinese poker sites.