ChessDB

ChessDB is a versatile and free chess database designed for use across multiple platforms including Apple Macs running OS X, Microsoft Windows, Linux, FreeBSD and most modern UNIX versions. The program boasts excellent international support with translations currently available in a range of languages such as English, Spanish, Norwegian, Polish, Portuguese, Czech, Dutch, French, German, Hungarian, Italian, Russian, Serbian, and Swedish.

One key strength of ChessDB is its comprehensive documentation. Although presently only available in English, updates are frequently made to enhance accessibility for speakers of other languages. This attention to detail is typical of ChessDB's commitment to providing players with a top-class software experience.

ChessDB is built upon the highly successful Scid chess database platform, but has been updated with many unique and powerful features that set it apart from its predecessor. Unlike many other free chess databases, ChessDB is not a stripped-back version of an expensive commercial product. Instead, users can enjoy a fully functional program with a wide range of tools to cater to their every chess-related need.

Overall, ChessDB is a strong contender for anyone in search of a robust, feature-rich and user-friendly chess database to help take their games to the next level.