Please clarify "for development purpose only"? SQLite is used in a lot of production software you rely upon daily, and is one of the most robust, useful pieces of code going.

http://www.sqlite.org/famous.html

Now it's an embedded database, which is why leokun's comment is out of place. However you can absolutely drop a queue in front of it, for instance, and serve many "simultaneous" users for a purpose such as a web forum.