PasKnight
Chess engine written in Pascal with an UCI interface.
...It does not have a graphical interface of its own; instead, it runs as a console application that communicates via text commands with a GUI (like Arena, CuteChess, or WinBoard).
PasKnight is written in Pascal using Lazarus & Free Pascal compiler. Executables are provided for Windows, Linux and macOS.
Elo of the engine v0.957 is just above 1900