SQLite

SQLite is a C-language library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. Unlike most other SQL databases, SQLite does not have a separate server process. It reads and writes directly to ordinary disk files.

A complete database with multiple tables, indices, triggers, and views, is contained in a single cross-platform disk file. This unique architecture makes it an ideal choice for embedded systems, mobile devices, and as a versatile application file format. The source code is in the public domain, granting unparalleled freedom.