For Students

Practice tools
Online metronome

Practice clock (set to 2 minutes per measure/section)

Classical Guitar Repertoire
http://digitalguitararchive.com/
This is a terrific site to find classical guitar pieces for free from old non-copyrighted publications.  Just search for a composer or piece search box and look for results with pdf files attached.

http://www.guitarpress.com/sheet.html
Here's another site to find free music.  It's a little easier to navigate, but not as comprehensive as the digital guitar archive. 

Recommendations on guitars, books, etc.
Click here