GraphicsGale is a great program for anyone who wishes to do some animation, pixel drawing, or most other forms of digital art.
There are many features like onion skin; it lets you see other frames of your animation. There are layers, multiple selection tools, a colour replacer, a grid view option, and a magnifying glass tool.
GraphicsGale is free to download and use for an unlimited amount of time, but if you want to be able to do a few extra things; like saving and loading gif images and animations, saving and loading Windows icons, Windows cursors, and Windows animated cursors.
If you ever do want to buy GraphicsGale it is only twenty five Canadian dollars.
With the amount of help it has been to me it would be hard not to recommend GraphicsGale. It is like an extremely good upgraded Paint.
I have been using GraphicsGale for quite a while already, and if you do decide to download it I have seen multiple tutorials if you ever have troubles.