ArchiSteamFarm: https://github.com/JustArchiNET/ArchiSteamFarm

I've been developing ASF for last 8 years with very active attitude, 10k commits with over 7k commits made by me (98.6% of all excluding bots and automation). While I do offer various donation options, the program was always free and open-source, and the overall amount of hours I've put into this would probably make at least several years of senior-level salary by now.

One of my finest creations that helped a lot of Steam users. The program was used approximately at 2.5 million of Steam accounts overall, having solid 30k downloads of each monthly release.