OptionalRule
Hyperion
I wrote a small post comparing different random agility score generation methods, why games may or may not want to use them, etc. This is an evergreen topic but I tried to include a table of the ideal stat set (all of it generated out of AnyDice with links to the originals), so you can examine a Standard Array by different means if you wish.
Sampling Random Ability Scores
Sampling Random Ability Scores