Diggin is library for Scraping & Spidering

You can checkout : http://diggin.googlecode.com/svn/

install via pear-command :

pear channel-discover openpear.org
pear install openpear/Diggin-alpha

Descrption & Manual:

http://openpear.org/package/Diggin (日本語)

http://diggin.musicrider.com/ (日本語)