PokerMate is a poker room guide, which carries multi-player tournament schedules of most major sites. Schedules are searchable by game type, buy-in etc. Short info on the major poker rooms. Also includes a forum and news. Very neat site.
Pot Odds Calculator
Pokerabcs.com offer a beginners guide to texas holdem poker. A collection of handy articles for the newbie player and a top list of poker rooms with reviews. The site also contains a Pot Odds Calculator for Texas Hold 'Em. Enter your hole cards, then the flop and get odds of improving your hand. Enter the turn card for revised odds. Also works out minimum pot size needed for you to have pot odds when calling. Recommended.
Pokercasinoguide.com is a poker guide to the best online poker rooms, toplists and in depth information about poker strategy and poker rules.
Yahoo! Directory - Poker
As always Yahoo! Directory provides a good listing. About 40 poker related sites are listed on poker in Yahoo! Directory and are generally speaking of good quality.
Review Poker Online
Online poker review site, with 11 reviews of good depth. Also includes link guide and user rating of the reviewed poker rooms. Managed by a professional online poker player.