add Croma

Author: Joker

README.md

@@ -75,6 +75,7 @@ App Name                   | Describe                  | Major Language
 ## Productivity  
 App Name                   | Describe                  | Major Language             | Download 
 :------------------------: | :------------------------ | :------------------------: | :------------------------: 
+[Croma - Palette Manager](https://github.com/numixproject/org.numixproject.croma) | Android packaging for Croma http://croma.numixproject.org | Java | [![Get it on Google Play](https://developer.android.com/images/brand/en_app_rgb_wo_45.png)](https://play.google.com/store/apps/details?id=org.numixproject.croma)  
 [EverMemo](https://github.com/daimajia/EverMemo) | Fast Record,Organize,and Share. The android memo app you will deeply love. ❤ http://mudlab9.com/ | Java | [![Get it on Google Play](https://developer.android.com/images/brand/en_app_rgb_wo_45.png)](https://play.google.com/store/apps/details?id=com.zhan_dui.evermemo)  
 [GitHub Android](https://github.com/github/android) | GitHub Android App | Java | [![Get it on Google Play](https://developer.android.com/images/brand/en_app_rgb_wo_45.png)](https://play.google.com/store/apps/details?id=com.github.mobile)  
 [Gitskarios](https://github.com/alorma/Gitskarios) | Github android aplication http://gitskarios.com/ | Java | [![Get it on Google Play](https://developer.android.com/images/brand/en_app_rgb_wo_45.png)](https://play.google.com/store/apps/details?id=com.alorma.github)