Text File Database
With the "Txt-Db-API" you can access normal text files like a SQL database. You need no special Database Software on the Webserver, but can still use SQL. You can use the API to create, query, change, delete Tables, and you don't have to bother with the Text-Files themself, (almost) everthing can be done with API calls. The Txt-Db-API is object oriented and very simple to use.