A bitmap palette dumper. When you sit in front of a 1/4/8bpp bitmap image file, with the indices of the colors encoding what you really want to know.
Setup: $ make
Do $ bmpldmp somefile.bmp to read something like this.
#, R, G, B
0, 0, 0, 0
1, 128, 0, 0
2, 0, 128, 0
3, 128, 128, 0
4, 0, 0, 128
5, 128, 0, 128
6, 0, 128, 128
7, 192, 192, 192
8, 128, 128, 128
9, 255, 0, 0
10, 0, 255, 0
11, 255, 255, 0
12, 0, 0, 255
13, 255, 0, 255
14, 0, 255, 255
15, 255, 255, 255
Guess the index by picking the closest RGB value of the color your viewer makes you see.
Subject to the Unlicense.