In the mid 2000s I had a few sites that I would occasionally get save games from but I cannot recall what they were and I'm not sure they would have survived in the same way ROMhacking.net did.
I was playing Max Payne 3 on my PS3 but unfortunately was experiencing consist crashes in chapter 5. It's a great game but I would prefer not to replay it now that I own the PC version.
Here's an extra tip by the way if you ever want to manually back up your saves you can check the PCGamingWiki page and it will list where the save file is located. Here is an example for Max Payne 3.
The PCGamingWiki will often tell you fixes to common bugs, quality of life improvements, and how to setup a controller as well. Really useful for older games.
The same tweaks should also work on Linux a majority of the time.