Come and try "Super Screenshot", it has the following features:
1. Easy to use, no need to be root, simply press the buttons on your phone for 2 seconds.
2. Resize, scribble, add text and add filters, it is very easy to edit your screenshots.
3. Your screenshots are stored on the SD card. In addition to the built-in sharing, you can also connect to your PC via USB to browse and copy the screenshots.
4. Completely free! Works with Android 4.0 and above.