SQLite is the most used database engine in the world.
Stop by the forum or explore the docs.
Devs have pledged to support SQLite through the year 2050.
The developer with a team of three, all of them himself at different points in time, was Tarn Adams of Dwarf Fortress fame.
On Stack Overflow, 1.2 million people have found the answer to How can I list the tables in a SQLite database file that was opened with ATTACH?.