Opera, the small-footprint, high-speed browser from Norway, is by some
the third most popular browser for the Windows 3.x and 95/98/NT platforms.
Native ports to the Amiga, BeOS, Macintosh, OS/2, Psion, and Unix are also
Version 3.0 had no PNG support at all, while version 3.5 supported it only
through old-style Netscape plug-ins (i.e., with no transparency support).
Version 3.51, released in December 1998, includes native PNG support. Opera displays PNG images progressively
and does gamma correction, but like Navigator, it does not invoke its internal
image handlers for images in OBJECT tags. Transparency, unfortunately, is
only partly supported. Truecolor and grayscale images with alpha channels
are rendered completely opaque; most palette images are rendered with binary
transparency, although at least one palette-based example exists in which the
image is rendered without any transparency.
Opera is available from the Opera Software home page,
http://www.operasoftware.com/. News on the non-Windows ports can be
found at http://www.operasoftware.com/alt_os.html.