Scid: a popular chess database application for Unix/Linux and Windows operating systems. Free.
Scid vs. PC: an alternative to Scid. It can manage databases, run chess engines, and play casual games against the computer or online with the Free Internet Chess Server, for both Windows and macOS. Free.
Windboard: a graphical user interface for chess games. Supported on all versions of Windows from XP to Windows 8.1. It hasn't been updated recently; some links on their webpage are broken. Free.
ChessPad: a chess database program with many features. Requires Windows XP or higher. Freeware.
Chess Opening Wizard (Bookup): a tool for learning chess openings, for Windows, macOS, iOS, and Android. Commercial.
Chessbase 18: a personal stand-alone chess database with many advanced features. For Windows. Commercial.
HIARCS: computer chess software program for databases, analysis and play on PC, Mac and iPhone. Commercial.
Shredder: a game playing and analysis tool, for Windows, macOS, Linux, iOS, and Android. Commercial.
Chessquid: a game playing and analysis tool that emphasizes learning tools, for Windows, macOS, and Linux. Commercial.
Chess King Analysis: a chess software package for playing, analyzing, storing your own games, solving puzzles, learning openings with an opening tree, and browsing a database of major games played by masters. For Windows and macOS. Commercial.
Chess Assistant: a chess database and analysis program. For Windows. Commercial.
Lucas Chess: computer chess software program to play and train chess, for Windows and Linux. Free.
Arena Chess GUI: Graphical User Interface (GUI) for chess. Arena helps you in analyzing and playing games as well as in testing chess engines. For Windows and Linux. Free.
IECC Chess Rating Calculator: a tool for rating IECC games written by Brad Coulding.
Scid vs. PC: an alternative to Scid. It can manage databases, run chess engines, and play casual games against the computer or online with the Free Internet Chess Server, for both Windows and macOS. Free.
Chess Opening Wizard: a tool for learning chess openings, for Windows, macOS, iOS, and Android. Commercial.
HIARCS: computer chess software program for databases, analysis and play on PC, Mac and iPhone. Commercial.
Shredder: a game playing and analysis tool, for Windows, macOS, Linux, iOS, and Android. Commercial.
Chessquid: a game playing and analysis tool that emphasizes learning tools, for Windows, macOS, and Linux. Commercial.
Chess King Analysis: a chess software package for playing, analyzing, storing your own games, solving puzzles, learning openings with an opening tree, and browsing a database of major games played by masters. For Windows and macOS. Commercial.
Chess Studio: a database management program, for macOS and iOS. Commercial (very inexpensive).