Releases on April 6th, 2009 and before

github
glennrp/libpng on GitHub v1.2.36beta04 v1.2.36beta03 v1.2.36beta02 v1.2.36beta01 v1.2.35 v1.2.35rc02 v1.2.35rc01 v1.2.35beta03 v1.2.35beta02 v1.2.35beta01 v1.2.34 v1.2.34rc01 v1.2.34beta07 v1.2.34beta06 v1.2.34beta05 v1.2.34beta04 v1.2.34beta03 v1.2.34beta02 v1.2.34beta01 v1.2.33 v1.2.33rc02 v1.2.33rc01 v1.2.33beta01 v1.2.32 v1.2.32rc01 v1.2.32beta01 v1.2.31 v1.2.31rc03 v1.2.31rc02 v1.2.31rc01 v1.2.30
Maybe you can find something interesting in this list