CorChess is a clone of Stockfish maintained for better performance on long time controls, trying at least partially to fill the gap between regular tests and demands of correspondence players.
https://www.mediafire.com/file/crlgjha0u7wc1ur/250119-CorChess-4.5.zip/file
Stockfish 17 source:
https://github.com/official-stockfish/Stockfish/archive/refs/tags/sf_17.zip