A hack/port of Piero Orsoni's wonderful Grsync - rsync frontend in GTK - to Windows(win32).
Pretty simple tool. Easy to use, but failed when it encountered non-Latin filenames (e.g. Chinese) and it didn't know what to do with it. So it looks like that it does not support UTF-8 in the filenames, but other than that, it's a pretty nifty little tool. Oh and P.S. I know that it's a problem with the tool because I have Cygwin 2.763 installed on my system and it was able to display the Chinese files just fine.