* [implydata/plyql](https://github.com/implydata/plyql) - A command line interface for issuing SQL queries to Druid via [plywood](https://github.com/implydata/plywood)
* [srikalyc/Sql4D](https://github.com/srikalyc/Sql4D) - A SQL client for Druid. Used in production at Yahoo.
Community Helper Libraries
--------------------------
* [madvertise/druid-dumbo](https://github.com/madvertise/druid-dumbo) - Scripts to help generate batch configs for the ingestion of data into Druid
* [housejester/druid-test-harness](https://github.com/housejester/druid-test-harness) - A set of scripts to simplify standing up some servers and seeing how things work
* [mingfang/docker-druid](https://github.com/mingfang/docker-druid) - A Dockerfile to run the entire Druid cluster
These are extensions from the community. (If you would like yours listed please speak up!)
* [acesinc/druid-cors-filter-extension](https://github.com/acesinc/druid-cors-filter-extension) - An extension to enable CORS headers in http requests.