App store: Evernote and Wunderlist

In case you haven't discovered these, Evernote and Wunderlist are two great apps in the App Store that allows you to sychronize data between all your iOS and OS devices. Even better, they're free! I often use them for Shopping lists, Recipes, and To-do lists.

Evernote
Click here for a description.

Notable features: 
Tagging
Synchronizing over multiple devices
Web access to notes, free
Now accessible on Macs and PCs!
Web clipping feature

Wunderlist
Click here for a description.

Notable features:
-Simple design
-Easy-to-use keyboard shortcuts
-Web access to lists (no download necessary)
-Free
-Really snazzy webpage (okay, this isn't really that important a plus in terms of functionality. But being easy on the eyes is always a plus!)