Photo viewing utility - Picasa

I've been very easily converted onto Picasa, photo viewing utility.  I found it when looking at iPhoto for the Mac, and wondered whether there was an equivalent for the PC.  I had been bugged by the poor preview capabilities of Explorer under Windows 98.  This seems a lot better and can export to a web page, which might be useful for creating quick web versions of large images.  Picasa was recently bought by Google.