Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
nifty [ˈnɪftɪ] adj (inf)(car, jacket) сти́льный*сти́лен (:gadget, tool) ло́вко приду́манный/приду́ман
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.