Update README.md

Author: monkstone

README.md

@@ -50,6 +50,7 @@ Like the original `ruby-processing`, `JRubyArt` is like a DSL for vanilla `proce
    2. [Hemesh][hemesh]
    3. [PixelFlow][flow]
    4. [LiquidFunProcessing][liquid]
+   5. [Handy][handy]
 
 6. Others
    1. [WOVNS patterns][wovns]
@@ -58,6 +59,7 @@ Like the original `ruby-processing`, `JRubyArt` is like a DSL for vanilla `proce
 ### User contributions are most welcome
 [Contributions][] add your [own][]
 
+[handy]:https://github.com/ruby-processing/JRubyArt-examples/tree/master/external_library/java/handy
 [liquid]:https://github.com/ruby-processing/JRubyArt-examples/tree/master/external_library/java/LiquidFunProcessing
 [flow]:https://github.com/ruby-processing/JRubyArt-examples/tree/master/external_library/java/PixelFlow
 [wovns]:https://github.com/ruby-processing/JRubyArt-examples/tree/master/examples/WOVNS