If you are interested in chess software, that is computer programs running in your computer and solving chess problems or presenting databases of chess compositions, then this page of WFCC (World Federation for Chess Compositions) will be useful for you:
https://www.wfcc.ch/software/
As you will observe, some "chess machines" (ie Alybadix), after a successful presence during many years, are "replaced" by newer software.
Some software products are free (ie Fancy for entering definitions and Popeye for solving the composition), while others must be bought (ie WinChloe, which is a solving program, it can create problem databases for the user, and contains a large database with hundreds of thousands problems with solutions and themes).
