I've had good luck using sqlite3 for both a hobby project (a photo organizer http://github.com/kghose/Chhobi) as well as for work (neural data analysis)
MongoDB is 'lightweight' in the sense it's easy to setup and persistence of both simple and complex objects is a breeze. The query interface is a bit ugly but it may be worth a look.
5 comments
[ 5.4 ms ] story [ 19.6 ms ] thread