Dropbox pioneered the personal cloud service, where all your stuff would be available no matter what device you were using. On Android, it holds its own—even against the highly integrated Google Drive. Dropbox can also act as a seamless backup for your images, automatically uploading every photo to the cloud. It even includes some light image editing tools. If you're the type of person with lots of files already stored in Dropbox, this app is a must-have. Android App
Let’s start by looking at the options under “Customize Look,” which allow you change basically everything within the app outside of the inbox layout (and to be fair, what else would you change about it?). Textra uses a theme engine to allow you to pick the main color of your app, along with a secondary accent color. You can match these colors as you see fit, with your bubble colors designed to match them. There are an endless amount of possibilities to choose from here, and the same goes for choosing the combination of your sent and received bubble colors (which, of course, you can set to match your theme). Each contact thread can be customized as well, but the easiest option to auto-shuffle the colors of your friends is to enable auto-theming contacts.
Mood Messenger is one of the youngest apps on our list. It doesn’t have a million and a half features, but that’s one of the nice things about it. Mood Messenger keeps things simple while still offering the key features you’ll want. Mood Messenger users can also send messages to each other without using SMS. The app is completely free with no in-app purchases. Droid App