foobar2k v0.8.3 - with round frequency works fine. needs foo_winamp_input plugin (tested with 0.0.5 50309)
xmplay 3.2.0.7 - with round frequency and seek backwards works fine (dll goes in directory with binary)
coolplayer 215 - no way to config within the program (that I can see), so you have to edit the INI. seems to work except that seeking is screwy. DLL goes in dir with bin.
kbmedia 2.41.2005.0711 (english patch) - works well, can sometimes freeze up changing tracks but resumes in a few seconds. use kbwinamp to create a kpi (KBM plugin) from the winamp dll. To do this run kbwinamp_installer.exe (with the rest of the files from the archive) with the winamp input dll in the same directory, type 'y' to convert each plugin. You'll then need the .dll and .kpi, put them somewhere in \Plugins.
Those are all the programs I know of, if there are others let me know and I'll test 'em out.
kbmedia has really nice ZIP support, it'll automagically expand the file whenever you're viewing it and it can load the artist, title, etc. data from the PSF tag to display it within it's own interface.