The Sourceforge site [0] is up to date:<p>&gt; UPDATE 12 November 2015:<p>&gt; The latest released versions are libpng-1.5.24 and libpng-1.6.19 [DOWNLOAD].<p>[0] <a href="http:&#x2F;&#x2F;libpng.sourceforge.net&#x2F;index.html" rel="nofollow">http:&#x2F;&#x2F;libpng.sourceforge.net&#x2F;index.html</a>