Ab Ripper X: I LOVE THIS ab workout!!! It works MORE than just your abs, It produces such amazing and FAST results. Little warning though: it is NOT for the faint of heart. It is intense!
The 300 Ultimate Ab and Core Challenge Workout. LOVE that there are pictures with this link so I don't have to google some of the moves
this is the P90X Ab ripper X workout
Ab Ripper Exercises with Photos