These sites provide Nonogram-solving programs in one form or another (binaries or source to download; Java applets). Platforms and languages include:
See a comparison of many of these solvers by Jan Wolter.
 Free nonogram,
              griddler, sudoku, wordoku puzzles and
              solvers! —
              A random puzzle each day, and a
              CGI solver
Free nonogram,
              griddler, sudoku, wordoku puzzles and
              solvers! —
              A random puzzle each day, and a
              CGI solver
              
             Griddlers solver, nonogram
              solver —
              A solver by Czechs Petr Olšák and
              Mirek Olšák (does colours too!) — portable GPL C
              source and Windows binary
Griddlers solver, nonogram
              solver —
              A solver by Czechs Petr Olšák and
              Mirek Olšák (does colours too!) — portable GPL C
              source and Windows binary
              
             Griddlers Solver -
              Editor and advanced auto-solver for favourite
              puzzles. —
              A solver for Windows, by Juraj
              Simlovic
Griddlers Solver -
              Editor and advanced auto-solver for favourite
              puzzles. —
              A solver for Windows, by Juraj
              Simlovic
              
             OddThinking » The No-Nos and
              Yes-Yeses of the Nonogram solution
              — A
              blog(?) talking about a solver in Python
OddThinking » The No-Nos and
              Yes-Yeses of the Nonogram solution
              — A
              blog(?) talking about a solver in Python
              
             T&O Japanese
              Puzzles - program with lots of nice
              picture-puzzles. — A Windows
              helper/solver; Dutch and English
T&O Japanese
              Puzzles - program with lots of nice
              picture-puzzles. — A Windows
              helper/solver; Dutch and English
              
             World of CryptoPics -
              The ultimate Nonograms/Griddlers site and
              software! —
              “The ultimate Nonograms/Griddlers
              software” — A solver and creator for Windows, by
              Yariv Hastilow
World of CryptoPics -
              The ultimate Nonograms/Griddlers site and
              software! —
              “The ultimate Nonograms/Griddlers
              software” — A solver and creator for Windows, by
              Yariv Hastilow
              
             네모네모로직퍼즐-LOGICHOME
              ver6.1 —
              A site for Korean fans to share
              puzzles, by 김경래 (Kyungrae
              Kim); includes a Java helper
네모네모로직퍼즐-LOGICHOME
              ver6.1 —
              A site for Korean fans to share
              puzzles, by 김경래 (Kyungrae
              Kim); includes a Java helper