iOS: Sorting through and organising photos is a problem for most of us, and one that hasn't really been solved despite a lot of attempts. Slidebox keeps things simple by allowing you to organise your photos with a few quick gestures.
Once you connect Slidebox to your photo library, you can delete photo with an upward swipe, or toss them into an album with a tab. You can also compare similar photos to help make it easier to pick which one to delete. It's a quick process to get through photos and since it syncs with your device's library, it's a great way to keep things organised. The iOS version is available now, with an Android version on the way soon.
Slidebox (Free) [iTunes App Store]