add rebound

README.md

@@ -171,6 +171,7 @@ Name | License | Demo
 [android-flipd](https://github.com/openaphid/android-flipd) | [MIT](http://opensource.org/licenses/MIT) | <img src="art/android-flipd.gif" width="49%"> <img src="art/android-flipd2.gif" width="49%">
 [FragmentTransactionExtended](https://github.com/DesarrolloAntonio/FragmentTransactionExtended) | [Apache License V2](https://www.apache.org/licenses/LICENSE-2.0) | <img src="art/FragmentTransactionExtended.gif" width="49%"> <img src="art/FragmentTransactionExtended2.gif" width="49%">
 [KenBurnsView](https://github.com/flavioarfaria/KenBurnsView) | [Apache License V2](https://www.apache.org/licenses/LICENSE-2.0) | <img src="art/KenBurnsView.gif" width="49%">
+[rebound](https://github.com/facebook/rebound) | [BSD 2  License](http://opensource.org/licenses/BSD-2-Clause) | http://facebook.github.io/rebound/
 
 Parallax
 ======================