Dabble - Windows program for playing dots and boxes. Currently one of the best opponents, and can easily beat novices, but still no match for the masters.Dots and Boxes Java Applet - Human against computer playing at one of three levels of difficulty, with variable board size.
Play-by-eMail Dots and Boxes - Play a game with 1-6 other players via email on an arbitrarily sized board.
ticalc.org - Dots and Boxes - Implementation for TI-86 calculator.
Yahoo Games: Dots - Networked Java implementation of dots and boxes. Includes minor rule variations, various board sizes, 2-4 players, ratings, and chatting.
Talk by Elwyn Berlekamp: Dots and Boxes, and related Mathematical Games - Streaming-video hour-long special seminar held at MSRI on September 13, 1999, by one of the world's experts on the game. Describes the mathematics behind winning strategies.
Postings from rec.games.abstract about Dots and Boxes - Includes, in particular, a large literature survey of the mathematical and computational literature. From August 1997.
Talk by Katherine Scott: Loony Dots and Boxes Endgame - Streaming-video 30-minute talk held at MSRI during the Combinatorial Game Theory Research Workshop, July 24-28, 2000. Describes a particular type of endgame which arises frequently in practice and can be solved in polynomial time.
Book by Elwyn Berlekamp: Dots and Boxes: Sophisticated Child's Play - Recent book (2000) published by A. K. Peters, and probably the only book entirely about this topic. Focuses on the theory of winning strategies, and includes many puzzles both solved and unsolved.
Work at Home Moms: Online dots-and-boxes - Play dots-and-boxes against the computer on an 8x8 grid.[Requires JavaScript]
Dots-and-Boxes Analysis - A dots-and-boxes analysis program and analysis results.
Vanishing Squares - Windows implementation of dots and boxes and a variation involving dice and a colored board in which some boxes are worth more than others.