pngcrush is a bulk pngcrush used PNG format image compression tools, the use of pngcrush about png image size can be reduced about 40 .

pngcrush-1.6.15
...............\pcr1615
...............\.......\adler32.c
...............\.......\cexcept.h
...............\.......\ChangeLog.txt
...............\.......\compress.c
...............\.......\crc32.c
...............\.......\crc32.h
...............\.......\deflate.c
...............\.......\deflate.h
...............\.......\example.c
...............\.......\gzio.c
...............\.......\infback.c
...............\.......\inffast.c
...............\.......\inffast.h
...............\.......\inffixed.h
...............\.......\inflate.c
...............\.......\inflate.h
...............\.......\inftrees.c
...............\.......\inftrees.h
...............\.......\long_mult.c
...............\.......\Makefile
...............\.......\png.c
...............\.......\png.h
...............\.......\pngconf.h
...............\.......\pngcrush.c
...............\.......\pngcrush.h
...............\.......\pngdefs.h
...............\.......\pngerror.c
...............\.......\pnggccrd.c
...............\.......\pngget.c
...............\.......\pngmem.c
...............\.......\pngpread.c
...............\.......\pngpriv.h
...............\.......\pngread.c
...............\.......\pngrio.c
...............\.......\pngrtran.c
...............\.......\pngrutil.c
...............\.......\pngset.c
...............\.......\pngtest.c
...............\.......\pngtrans.c
...............\.......\pngvcrd.c
...............\.......\pngwio.c
...............\.......\pngwrite.c
...............\.......\pngwtran.c
...............\.......\pngwutil.c
...............\.......\png_64bit_product.c
...............\.......\trees.c
...............\.......\trees.h
...............\.......\uncompr.c
...............\.......\zconf.h
...............\.......\zconf.in.h
...............\.......\zlib.h
...............\.......\zlibdefs.h
...............\.......\zutil.c
...............\.......\zutil.h

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