SQLite is a C-language library that implements a small, fast, self-contained, high-reliability, full-featured, SQL database engine. It is the most widely deployed database engine in the world, embedded into all sorts of applications. Its simplicity and ease of use make it an ideal choice for embedded database needs, mobile apps, and small to medium-sized applications that do not require the overhead of a full-scale database server.
In the tools quadrant, SQLite is categorized in the adopt ring because it has been proven as a reliable and mature technology. It offers zero-configuration, which means no setup or administration is needed, making it an excellent choice for developers seeking a hassle-free database solution. Its ability to handle most SQL queries and its support for ACID transactions make it relevant for a wide range of applications. SQLite's lightweight nature also contributes to its adoption in environments where resources are constrained. This makes it a versatile tool in a developer's toolkit.