These sites provide Nonogram solvers or helpers in one form or another (binaries or source to download; Java applets). Solvers take a puzzle and produce its solution(s). Helpers act like electronic pen and paper, but leave the logical deductions to the human.
Also called Paint By Numbers Puzzle, Japanese Puzzle or Gridlers. This category contains online and video game versions of nonograms.— from the Open Directory Project (ODP)