After stuffing myself silly with a scrummy Christmas dinner, I felt I need to work it off a little with a bit of programming. I have had a number of requests to add hexadecimal support to the Bitboard Viewer. The original version also had a nasty overflow bug which showed up if bit 63 was set. I managed to fight off the tryptophan from the turkey to correct the bug and add hexadecimal support:
I also added the ability to click on a file or rank title to XOR the bits in the corresponding file or rank.
You can download it here.