SQLite Cloud
SQLite Cloud is a distributed relational database system built on top of the SQLite database engine. It has been specifically designed from the ground up to ensure the strong consistency of your data across all nodes in a cluster.
Gravity Programming Language
https://github.com/marcobambini/gravity
Gravity is a powerful, dynamically typed, lightweight, embeddable programming language written in C without any external dependencies (except for stdlib). It is a class-based concurrent scripting language with modern Swift-like syntax. It is used in several game engines.
The first commercial DBMS based on SQLite
https://en.wikipedia.org/wiki/REAL_Server
I developed REAL Server while I was attending university. Since 2013 it has been deployed more than 140 million times worldwide. CubeSQL (was Real Server) is still available today at SQLabs.