The Collaborative International Dictionary of English v.0.48:

Featly \Feat"ly\, adv. [From Feat, a.]
   Neatly; dexterously; nimbly. [Archaic]
   [1913 Webster]

         Foot featly here and there.              --Shak.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

46 Moby Thesaurus words for "featly":
   ably, adeptly, adroitly, agile, agilely, aptly, artfully,
   artistically, brilliantly, capably, cleverly, competently,
   cunningly, deftly, dexterously, dextrously, efficiently,
   excellently, expertly, fleet, graceful, handily, ingeniously,
   light, light-footed, masterfully, neat-fingered, neat-handed,
   neatly, nimble, nimble-footed, nimbly, peart, proficiently,
   resourcefully, skillfully, sprightly, spry, spryly, superbly,
   sure-footed, well, with consummate skill, with finesse,
   with genius, with skill