Cutechess
Free / Open sourceGUI and command-line tools for running matches and tournaments between chess engines. The de facto standard for engine testing.
PGN Tools is my Windows desktop GUI for working with PGN files and databases — one program that replaces the older single-purpose utilities I used to publish.
The databases, analysis suites, and engine tools most players end up wanting.
GUI and command-line tools for running matches and tournaments between chess engines. The de facto standard for engine testing.
The leading commercial database and analysis suite, with huge game collections (Mega Database) and deep engine integration.
Shane's Chess Information Database — a free program for storing, searching, and studying large collections of games.
An actively maintained fork of SCID with a refined interface, gameplay, and analysis features. An excellent free database for most players.
The SCID project's own hub of compatible add-ons — game databases, player data (ratings and photos), opening books, engines, and endgame tablebases.