ChessX is a free, open-source chess database application available for Windows, macOS, and Linux. It provides a graphical interface for managing PGN game collections, replaying and annotating games, searching games by player or position, and analyzing with external UCI engines.

The interface is cleaner and more modern than SCID's by default, making it a good entry point for players who want database software without a steep learning curve. Core features include a game list with quick navigation, an analysis board with engine integration, opening statistics, and filters for finding games by player, ECO code, or position.

ChessX is entirely free and open source under the GPL license. It is a practical choice for players who want a lightweight, reliable database viewer for managing personal game collections and PGN archives without the complexity of more comprehensive tools like Scid vs PC.