Hello SoumyaK4,
Thank you for the nice collection of useful resources!
Why did you put https://go.kahv.io/ as Go Variants Server(Outdated)? As far as I know, this is still the only place where one can play variants such as Hidden Move Go, just to name one.
I am happy that you linked govariants.com as Go Variant Server, but both are individual projects that can coexist. Comparing the available variants, there’s only little overlap.
Also may I suggest adding this recent publication: AntonTobis Random Opening Generator.
Regards,
Martin