IS there a community Ruleset for M&M?

[JC the Roleslayer]

IS there a community ruleset for mutants and masterminds?

[Trenloe]

Not a community ruleset, but a commercial one. On sale now: https://www.fantasygrounds.com/store/product.xcp?id=GRR5501eFG2

[DrakosDJ]

Not that I'm aware of. They sell an official M&M 3e ruleset in the FG store.

There was a group supposedly updating the official ruleset but I haven't heard anything on that front in a while.