Yousei made this before he dissapeared from the earth a few years ago, and I thought some of you aspiring Chrono Trigger editors might find it useful, or may not have known about it.
This program is awesome, and I constantly use it. You type in the offset where the palette you want to hack starts, and the colors are displayed. You edit them, and then you save them. Easy!
You can also search for colors (directions in it's readme file), so if the offset isn't known, you can find them yourself, even if you've never done anything like this before.
The picture below has the offset already typed in for Chrono's palette (which is the start of ALL the character, npc and enemy palettes consecutively).
And the colors displayed (which can be scrolled to the left) are the start of Crono's actual colors, ready for me to completely recolor him.
And a download..
http://www.romhacking.com/utils/general/palette/snspal03.zip