“ZeroVer is satire, please do not use it”
Less has my favorite version numbering system. Sequential.
Latest stable release: Version 598
https://www.greenwoodsoftware.com/less/
Especially, like, what if you release a bugfix for a significantly old version? Do you give it an up-to-date number? Do you not give it a number at all?
(Also I see a 581.2 on that page.)