I've created a little tool for pixel artists and game programmers.
It loads from and saves to MS Pal, Jasc PAl, Adobe Colour Tables(*.ACT), and raw GBA data (*.GBAPal). It also extracts palettes from icons, paletted bitmaps, and soon GIF's.
The program is completely free and its available from my site http://www.bmts.com/~gdonald/
I've also submitted the Delphi code, here.