Add Simple File Manager

Author: tibbi

categories/tools.md

@@ -141,6 +141,7 @@ App Name                   | Describe                  | Major Language
 [Simple Calendar](https://github.com/SimpleMobileTools/Simple-Calendar) | A Calendar with a customizable widget | Java | [![Get it on Google Play](http://i.imgur.com/7sq06lr.png)](https://play.google.com/store/apps/details?id=com.simplemobiletools.calendar)
 [Simple Camera](https://github.com/SimpleMobileTools/Simple-Camera) | A front/rear camera with a flash | Java | [![Get it on Google Play](http://i.imgur.com/7sq06lr.png)](https://play.google.com/store/apps/details?id=com.simplemobiletools.camera)
 [Simple Draw](https://github.com/SimpleMobileTools/Simple-Draw) | A simple canvas you can draw on | Java | [![Get it on Google Play](http://i.imgur.com/7sq06lr.png)](https://play.google.com/store/apps/details?id=com.simplemobiletools.draw)
+[Simple File Manager](https://github.com/SimpleMobileTools/Simple-File-Manager) | A simple file manager for browsing the storage | Java | [![Get it on Google Play](http://i.imgur.com/7sq06lr.png)](https://play.google.com/store/apps/details?id=com.simplemobiletools.filemanager)
 [Simple Flashlight](https://github.com/SimpleMobileTools/Simple-Flashlight) | Well, a simple flashlight | Java | [![Get it on Google Play](http://i.imgur.com/7sq06lr.png)](https://play.google.com/store/apps/details?id=com.simplemobiletools.flashlight)
 [Simple Notes](https://github.com/SimpleMobileTools/Simple-Notes) | A simple textfield for simple notes with a widget | Java | [![Get it on Google Play](http://i.imgur.com/7sq06lr.png)](https://play.google.com/store/apps/details?id=com.simplemobiletools.notes)