diff --git a/README.md b/README.md
index 348640e..191d59b 100644
--- a/README.md
+++ b/README.md
@@ -66,6 +66,7 @@ A awesome list about Software Defined Network (SDN)
 - [OESS](https://github.com/globalnoc/oess) - The Open Exchange Software Suite to configure and control OpenFlow Enabled switches.
 - [Beehive Network Controller](https://github.com/kandoo/beehive-netctrl) - A distributed SDN controller built on top of Beehive. It supports OpenFlow but can be easily extended for other southbound protocols.
 - [Ravel](https://github.com/ravel-net/ravel) - A software-defined networking (SDN) controller that uses a standard SQL database to represent the network.
+- [Trema](https://trema.github.io/trema/) - A full-stack, easy-to-use framework for developing OpenFlow controllers in Ruby and C.
 
 # Simulator/Emulator