I just use 7-Zip, after all it was written by the creator of the format and is also open-source. However, here's a non-exhaustive list of programs that can read 7z if you want to continue your pointless search. AFAICT WinRAR can also read 7z and it's hosted in a secure site, but it's shareware and will start showing you ads after the 40-day trial expires, unless you buy it...
Avell A70 MOB: Core i7-11800H, GeForce RTX 3060, 16 GB DDR4-3200, Windows 11 (Insider Preview)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)
