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.
A Nonogram Solver using CSP
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)