Kindle [Free]
This one is great, because it syncs with your other devices with the Kindle app on so you can pick up reading where you left off on another device. This only works with books downloaded from Amazon, but you can get lots of free books from them, so it’s still a lot of content. You can also see your highlights and notes, as well as make notes and highlights* on your iPod/iPhone.
*A note about highlighting: After pressing the word with which you’d like to begin the highlight, you need to use your thumb to drag the highlighter over the text, as trying to do it with your forefinger doesn’t work.

Awesome Note [Very limited free version/full version $3.99 USD]
This combines the functionality of the pre-installed Calendar, Reminders an Notes, as well as has features those programs do not. It’s wonderful for people who like an uncluttered desktop or menu folder. It’s also quite customizable, with a variety of colours, note styles and fonts (including serif fonts, which I was beginning the think iPods were allergic to). You can create as many folders as you’d like, as well as choose between four note types-Normal, To Do, Diary, Anniversary. Notes can also have uploaded photos, drawings, locations or a photo taken from your onboard cameras. Yes, you can draw on the notes.

Photo Manager Pro [$2.99 USD]
I was a bit peeved to have to purchase this because it does everything the photo software that comes on your device should do. It, you know, allows you to organise your photos and videos into separate folders, rather than forcing you to have all of your photos in two folders if you’d like to put them in categories. With Photo Manager Pro, you can rename your photos, give them captions, rate them and mark your favourites, sort manually if you’d like and several other things. The only complaint I have is that if you’d like to set one of your photos as your wallpaper, you have to export it to the dreadful Photos folder. However, if the only time I have to go in there is to change the wallpaper, I’m happy.