CrateDB

• Name: CrateDB
• Status: active
• Website: https://crate.io/
• GitHub: https://github.com/crate/crate
• Language: java
• Backends: [ "elasticsearch", "s3" ]
• Protocol: [ "tcp" ]
• Query: [ "sql" ]
• License: apache-2.0
• Author: mfussenegger seut 
• Contributed by: at15 

It also support GEO.

Links

• https://github.com/crate/crate/blob/master/devs/docs/architecture.rst