Mailbox is a free mail app for iPhone. It downloads your messages to a secondary cloud server before the messages hit your phone. I have no idea how they’re making money. This can’t possibly go wrong.
The app is really slick, though, and the way it does GTD with email is solid. I’m finding it a bit fiddly to make it work with OmniFocus, just because I’ve made it a point to turn OmniFocus into my only source when I go to look at what I have to do for the day, and now having to split to-do tasks between two places is—well, fiddly. ↩