The MNG test-suite is designed to test the MNG capabilities of your browser or image-viewer. The latest version of this test-suite can be found on libmng.com. To test your image-viewer you can also download the test-suite in a single zip-file. Please note that implementations based on libmng-1.0.4 (or older) may not correctly display the images on the pages that the bottom 11 rows point to, or in the worst case may even cause the application to hang or crash!
There are 2 sets containing several test-pages: The first set is based on the <IMG> tag. This can be used to test browsers that have native support for MNG. The second set is based on the <EMBED> tag. It can be used to test browsers with a plugin or ActiveX control (if it supports <EMBED>) that supports MNG.
Links to more info on MNG enabled browsers and plugins.
The first 8 rows (and several of the others too) point to test-samples which are based on the PNG test-suite. This test-suite has been a de-facto standard for PNG enabled apps to test their compliance with the PNG specification. The suite was build and is being maintained by Willem van Schaik, one of the co-authors of the PNG & MNG specs. He has gracefully allowed me to re-use his images to test the PNG-specific capabilities of libmng. It goes without saying that this also shows the strong relationship between MNG and PNG!

<IMG> tag | <EMBED> tag
Test PNG suite basic features | Test PNG suite basic features
Test PNG suite alpha-channel support | Test PNG suite alpha-channel support
Test PNG suite histogram & chromaticity support | Test PNG suite histogram & chromaticity support
Test PNG suite gamma support | Test PNG suite gamma support
Test PNG suite filter support | Test PNG suite filter support
Test PNG suite text/significant-bits support & non-square images | Test PNG suite text/significant-bits support & non-square images
Test PNG suite size stress-test | Test PNG suite size stress-test
Test PNG suite cheap transparency support | Test PNG suite cheap transparency support
Test basic MNG functions | Test basic MNG functions
Test scrolling text-images | Test scrolling text-images
Test scrolling images | Test scrolling images
Test color-correction by difference. | Test color-correction by difference.
Test color-correction by similarity. | Test color-correction by similarity.
Test MNG BACK image&tile functions | Test MNG BACK image&tile functions
Test MNG promote functions (1) | Test MNG promote functions (1)
Test MNG promote functions (2) | Test MNG promote functions (2)
Test MNG promote functions (3) | Test MNG promote functions (3)
Test MNG promote functions (4) | Test MNG promote functions (4)
Test delta-images on gray target | Test delta-images on gray target
Test delta-images on gray+alpha target | Test delta-images on gray+alpha target
Test delta-images on RGB target | Test delta-images on RGB target
Test delta-images on RGB+alpha target | Test delta-images on RGB+alpha target
Test MNG PAST functions | Test MNG PAST functions
Test dynamic MNG functions | Test dynamic MNG functions