Alternative to a 1D20 such as 2d10 or 3d6 extension?

[Raddu]

Is there an extension out there that changes all 1d20 rolls for attacks, saves, etc to either 2d10 or 3d6?

I'd like to play around with that kind of distribution to make character's attributes, skills, proficiencies, etc more important and less swingy than the 1d20

[Zacchaeus]

Not that I am aware of. That would be a significant change to the ruleset.