5 links
Guy Fawkes's Analysis of Boolean Tic-Tac-Toe
chiark.greenend.org.uk
Analysis of variant that allows anti-play.
Tic Tac Toe Strategy Solutions
chessandpoker.com
Details a step-by-step process that allows the first player to win or draw, but never lose.
Tic-Tac-Toe Strategy
ostermiller.org
Tic-Tac-Toe strategy with explanations and opportunity to put the advises into practice.