EnzymeTemplates is an object-oriented PHP library for templating data from an arbitrary database. It can grab data from your database without you having to write any SQL. It is part of the Enzyme open-source project.
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A major overhaul to several key functions, two new demos, much more documentation, and a new "reflexive" relation which enables tree-like data being loaded from the database automatically (this makes creating a Slash-like site really easy).