PicSay – Photo Editor
It is among the most popular app that offers the basic features with the free version. But if you download the paid version, you get additional content like more filters and more actual features like pressure-sensitive drawing, removing red-eye, and others.
Photo Editor Pro
Photo Editor Pro is a solid photo editor, it features a one-touch enhance feature, filters, frames, and the basic photo improvement tools like color balance, crop, and rotate. Good for who want simple and don’t want advanced editing tools.
Cupslice Photo Editor
Cupslice is a photo editor with a little more tact and polish, even if the features aren’t as heavy as some of these others. It comes with over 50 effects to start along with your basic editing tools. It also includes a number of stickers you can add to photos and that number gets updated every week. It’s a nice, simple app that should suit the needs of most people.
SnapSeed
While the photos app on Google+ has its own small editor, Snapseed is owned by Google and it is, without question, a whole lot better than the Google+ photos app. With this app you can auto-tune and auto-correct images quickly if need be. There are also the standard filters, adjustment features, and frames.
Autodesk Pixlr
Autodesk Pixlr is a highly rated and popular photo editor app and has a host of editing options including red-eye removal, a whiten teeth option, a one-click enhance tool, borders, filters, and you can even preview effects using the Pixlr Live feature.
Adobe Lightroom mobile
Adobe recently released their iconic Lightroom application to Android. It allows for editing of RAW image format and the ability to enhance photos with a range of presets and tools. The app is a 30-day trial but those who have a Creative Cloud subscription can keep using it after the trial. You can also sync with desktop versions of Lightroom.