SQLite

SQLite is a self-contained, serverless, zero-configuration, transactional SQL database engine implemented as a C library. A complete database is stored in a single cross-platform disk file with no external dependencies or setup required. It supports full-featured SQL including ACID transactions, partial indexes, JSON, common table expressions, and window functions. SQLite is in the public domain and widely embedded in mobile devices, desktop applications, IoT devices, and browsers.