Updating Readme

Adding examples, link to form for new contributions and a placeholder for where we need community help

Author: zinuga

README.md

@@ -1,2 +1,14 @@
 # grpc-contrib
-gRPC ecosystem that complements gRPC core
+
+[gRPC ecosystem](https://github.com/grpc-ecosystem) is the organization where we are curating repositories of community contributions around gRPC. If you are interested, please submit this [form](https://docs.google.com/a/google.com/forms/d/119zb79XRovQYafE9XKjz9sstwynCWcMpoJwHgZJvK74/edit).
+
+# Known useful contributions around github
+
+- [gRPC gateway](https://github.com/gengo/grpc-gateway)
+- [Polyglot](https://github.com/grpc-ecosystem/polyglot)
+- [Zipkin Support for gRPC](https://github.com/openzipkin/brave/tree/master/brave-grpc)
+- [Prometheus monitoring for gRPC Go](https://github.com/mwitkow/go-grpc-prometheus)
+- [Flatbuffer support for gRPC C++] (https://github.com/google/flatbuffers/tree/master/grpc)
+- [Go Kit with gRPC as transport] (https://github.com/go-kit/kit/tree/master/transport/grpc)
+
+#Issues where we would like help from the community