SQLite is awesome, and a true model of just how good software can be. It's also designed by programmers for programmers and has a well-defined API that can be t

SQLite is awesome, and a true model of just how good software can be. It's also designed by programmers for programmers and has a well-defined API that can be thoroughly tested. It's the perfect module, with an API (SQL) that has been refined over several decades. Less well defined stuff - like interacting with users - is harder to test.