I’ve compiled up a version of Thomas Akin’s 2hash for Windows for my own nefarious deeds and thought other people might find it handy. You can download it (including source, which is mostly unmodified) right here. It can crash unexpectedly if you don’t provide proper input; I haven’t bothered carefully sanitising user input just yet. If anyone else other than me actually uses it I’ll put some more effort into it.
Discovered 2hash yesterday – a simple GPL’ed tool to calculate the md5 and sha1 hashes of a file in a single read. If you’re regularly checking/calculating hashes of large files this’ll save you a lot of disk IO.
Update: The source site is down, so I have mirrored it here.
Update 2007/10/26: 2hash, by default, doesn’t support large files. If you compile it with the CFLAGS updated with ‘-D_FILE_OFFSET_BITS=64’ (as recommended by this page), it will work.