XVI32 is a freeware hex editor running under Windows 95, Windows 98, Windows NT, Windows 2000, and Windows XP. The name XVI32 is derived from XVI, the roman notation for the number 16.
The current release 2.51 is available since August 2, 2003. It comes with a complete online help and requires only 975 KB of hard disk space. There is no setup program needed – just unzip the downloaded archive to your hard disk! XVI32 doesn’t write any data to your registry.[source: XVI32 web site]