Below is a chart made to assist in tuning your guitar to Drop C
California rock band Pierce the Veil released a cover of Bruno Mars' hit song "Just the Way You Are" This cover is played in Drop C. The first and second verse of this song features power chords and strong leads, with a chorus that slows down and plays octave chords. At 2:35 the band begins a breakdown to close the song, with chugging (open string playing) and leads played on the lower strings.
Shown above are some notable bands who play in Drop C, (from top to bottom) Woe Is Me, Confide, and Pierce the Veil. Tune in next week for Drop A tuning!
Where I got my info
http://www.howtotuneaguitar.org/tuning/drop-c/
http://en.wikipedia.org/wiki/Drop_C_tuning