Scid is a free chess database application for Windows, Linux and Mac OS operating systems. It can be used to browse databases of chess games, edit games, search for specific games and produce printable reports on players and openings.
Scid uses its own special three-file database format which is very compact and fast, but it can convert to and from the standard PGN (Portable Game Notation) format.
Scid (Shane’s Chess Information Database) is named after its original developer, Shane Hudson. Currently the development of Scid is continued by Pascal Georges. More information about Scid as well as the download files can be found on the Scid Homepage.