Approximating Formulas for the USCF Rating System
     Explanation of how players can compute & update their USCF rating, as well as an explanation of how the rating formulas work.

Computer Chess by Eric Hallsworth - Ratings
     Ratings of chess programs and dedicated machines.

Elo's Chess Rating List from the book: The Rating of Chess Players
     Historical ratings for over 300 chess players. Information is from Arpad Elo's book The Rating of Chess Players. Information only through the late 1970's though.

Elo's Win Percentage Expectancies
     Chart showing the win-loss expectancies between players of various rating differences.

FIDE Ratings
     Official rating lists for Top 100, women, juniors, girls, and rating list information.

Free Chess Engines Rating List
     Extensive rating list of about 100 free chess engines, based on Lyapko George's 30min/game tournaments.

Glicko Rating System
     Explanation of a new type of chess rating system.

Swedish Chess Computer Rating List (SSDF)
     The most important rating list of computer chess programs.