Keeping up with email on your phone is, at best, a tricky affair – especially if you have multiple accounts. The Mailbox app makes it notably easier.
Projectbook lets you blend your notes, photos, audio recordings and more onto a single page, letting you stay on top of things.
The Visual Travel Checklist lets you put together a list of items to remind you what to take (or purchase) for a trip.
The Clear app simplifies list-keeping for iPhone users, using a heat map to show the priority of items and a simple swipe functionality to check them off.
The Instapaper app lets you save web pages and browse them offline. Even better, it strips the ads, graphics and other extras from the page, which helps you concentrate more.
Scan documents and receipts with your phone and turn them into pdf files.
Smart phones are all about staying organized and the Astrid app is just one more way to do that.