Aika is a simple and high performance key-value in-memory database.
You can test it using redis-cli:
sh redis-cli -p 9919
127.0.0.1:9919> set name John
127.0.0.1:9919> get name "John"
It's just a research project, not ready for production.
You can build your own Aika version by cloning the repository and using Haskell stack:
git clone git@github.com:micheleriva/aika.git && cd aika
stack build && stack exec aika
Aika is MIT licensed.