Elixir 2
This app creates nice icons for widgets to look better. You can change settings and do many actions like you can launch, uninstall, clear, move and organize apps. It also displays information about battery, internal and external storage, CPU, memory, telephony, Wi-Fi, Bluetooth, location, display, airplane mode, synchronization, camcorder, audio, camera, input devices, build, operating system, environment variables, settings, configuration, clipboard, features, java system properties, shared libraries.

It’s entirely free.
Google Books
Now, you can have your eBooks library in your Android phone with this app. You can select from nearly 3 million free eBooks or you can get eBooks by jumping into a bestseller. You can personalize the reader according to your choice and need. You can pick up your readings wherever you go and settle down with a great book on your phone.

This app has a landscape mode for flowing text. This app provides you ease and convenience. You can get it free of cost.
Speaktoit Assistant
Speaktoit Assistant is an amazing app for your Android device. Now you don’t need to memorize special commands or complex interfaces. You can get what you need by simply speaking or typing in everyday language with the help of this app.

You can also choose assistant's appearance according to your choice and set up different voices. It’s free of cost. You can get it now.