There are many great fingerpicking lessons on guitartricks, here's a few links.

For classical music I would recommend looking at Christopher Schlegel. Christopher has many tutorials on specific songs.

http://www.guitartricks.com/instructor.php?input=155014

If you are a beginner at fingerpicking I suggest Lisa McCormick's tutorial

http://www.guitartricks.com/lesson.php?input=10238&s_id=272

Bobby Howe's also have great section for fingerpicking

http://www.guitartricks.com/instructor.php?input=251694

Then if you are looking for a challenge, take a look at some hybrid picking by Ben Lindholm

http://www.guitartricks.com/lesson.php?input=9718&s_id=299