Here is a c_version of Thomas Bleeker's pnglib 1.0,
His site is https://www.madwizard.org/programming/projects/pnglib

 Thomas's original code is x86-asm. She(the code) can be link without Zlib.
With the author's permission, Leisure bamboo translate her to c.
So she can be compile by turbo c 2.0, borland c 4.5, visual c 6.0,
keil c51 7.5, or others.

 Some(not all) plainform where she can run, as below:

1)dosbox	see about her in sample.tc2, dpmi.bc4;	see capture here:
2)window	see about her in sample.bc4, dpmi.bc4, sample.vc6;	see capture here:
3)c51's uv2 simulator	see about her in sample.uv2;	see capture here:
4)arm singlechip	that is cino f780 barcode scanner.	No advertisement capture here.

 She can decompress apng(Animated PNG) now, There are some
demo file 01.png, 04.png ... 32.png in root folder.

 She is small(12k for vc6, 32bit code; 21k for bc4, 32bit code;
27k for tc2, 16bit code) and beautiful.