If you're looking for an easy way to add text to your photos, then you should check out Over: text+ photos. The lightweight photo editor only does text, but it does so with style and ease.
The Over: text+ photos app uses a dial as its menu, which is a nice change from the traditional button-driven interface. It includes 19 fonts, and you can buy more via a 99-cent in-app purchase. Besides changing the font type, you can also adjust the size and the alignment of the text. The only drawback I found is the text color, which is limited to shades of grey, white and black. These colors are compatible with most photos, but this limitation might be disappointing for users who like to add a splash of color to their text.