ORM libraries for PHP?

Question

PHP

Good afternoon, at the weekend there will be a lot of free time, I would very much like to dig into other people's sources. And at present work with DB interests. Tell me who used what libraries. Preferably not ActiveRecord due to its simplicity =)
Thanks in advance.

Answer 1

Active Record from Yii…

Answer 2

www.doctrine-project.org/
www.propelorm.org/