The Collaborative International Dictionary of English v.0.48:

Commendable \Com*mend"a*ble\, a.

   Note: (Formerly accented on the first syllable.) [L.
         commendabilis.]
   Worthy of being commended or praised; laudable; praiseworthy.
   [1913 Webster]

         Order and decent ceremonies in the church are not only
         comely but commendable.                  --Bacon.
   -- Com*mend"a*ble*ness, n. -- Com*mend"a*bly, adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

commendable
    adv 1: in an admirable manner; "the children's responses were
           admirably normal" [syn: admirably, laudably,
           praiseworthily, commendable]
    adj 1: worthy of high praise; "applaudable efforts to save the
           environment"; "a commendable sense of purpose"; "laudable
           motives of improving housing conditions"; "a significant
           and praiseworthy increase in computer intelligence" [syn:
           applaudable, commendable, laudable, praiseworthy]

Moby Thesaurus II by Grady Ward, 1.0:

49 Moby Thesaurus words for "commendable":
   admirable, advantageous, auspicious, beneficial, benevolent,
   beyond all praise, bon, bonny, braw, bueno, capital, cogent,
   creditable, deserving, elegant, estimable, excellent, exemplary,
   expedient, fair, famous, favorable, fine, good, goodly, grand,
   healthy, helpful, kind, laudable, meritorious, model, nice, noble,
   pleasant, praiseworthy, profitable, regal, royal, skillful, sound,
   splendid, unexceptionable, useful, valid, very good, virtuous,
   well-deserving, worthy