The Collaborative International Dictionary of English v.0.48:

Free-hand \Free"-hand`\, a.
   Done by the hand, without support, or the guidance of
   instruments; -- of drawing or sculpture; as, free-hand
   drawing. See under Drawing.

   Syn: free, freehanded, unguided, untraced.
        [1913 Webster + WordNet 1.5]

Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "freehand":
   blunt, candid, direct, free hand, free-acting, free-going,
   free-moving, free-spoken, freehanded, graphic, monochrome, open,
   outspoken, painty, pastose, photographic, pictorial, picturable,
   pictural, picturesque, plain-spoken, polychrome, scenographic,
   scumbled