Ninja SMS v1.1.0 
Ninja SMS v1.1.0
Required Android O/S : 2.2+
Ninja SMS enables true multitasking by allowing you to read and reply to incoming messages without ever leaving your current screen.
Multiple floating windows at the same time
Drag and drop windows anywhere with ease
Collapse mode helps minimize popups for easy access anytime
Notification animation for new incoming messages in minimized chat windows
Maximize mode allows you to switch to full texting mode in an instant
Transparency mode to help you view other windows in the background as you read and reply to messages
Settings panel lets you control which contacts the app will show popups for
1 easy switch to enable and disable anytime
Efficient battery usage so you can keep the popups open as long as you want
Elegant design and graphics
Android