Wikipedia
UdiWWW was an early freeware graphical HTML 3.2 web browser for 16-bit and 32-bit Microsoft Windows. It was written and developed by Bernd Richter in C/ C++ from 1995 to 1996. Following the release of version 1.2 in April 1996, Richter ceased development, stating "let Microsoft with the ActiveX Development Kit do the rest."
UdiWWW was among the first web browsers to support the then proposed HTML 3.0 standard. In doing so, it was also among the first browsers to support the specifications html math, html figures, and the PNG image format, something that other leading browsers at the time such as Netscape and Internet Explorer 2.0 did not. The browser gained some popularity during 1996, but after development was abandoned, the browser fell out of favor.
The browser is no longer available from its original homepage. However, it (and its source) can still be downloaded from mirror sites.