Aft is currently alpha software. It isn't quite ready for production workloads!
Aft is a tool for rapidly creating small API-driven backends.
Aft includes a powerful, intuitive API for reading and mutating data from a client. All you need to do is sketch out your schema. No separate database to run or migrate—Aft will hold your data directly in memory, and write it down to a single file on disk.
Aft won't build a UI for you, but it will play nicely with whatever client technology you choose.
It offers a UI for defining your schema, custom datatypes with validation, access controls, a login system, scriptable RPCs, audit logging, and more.