For those who like to do some pretty basic editing of photos before you ship them off to your Facebook, Twitter or email, you'll want to take a look at this great little app by XDA member 'menos'.
Think of it as analogous to MS Paint.
You simply run the program, open an image (.png, .jpg, .bmp) and from there you can crop, draw shapes e.g. circle, speech bubbles (very cool), eye dropper for color sample, resize and it even has an undo button.
The buttons are sort of tiny, so while it worked on my 3.2" eXpo, it was a little difficult. However, devices with 3.6" or larger screens should have no issues.
Overall, considering the price (free, but donation encouraged), this app can go up against the much more pricey "professional" competitors on the market. We give it a big thumbs up as it made my Chinese rice-monster very happy.