Lateral Lunges, Plie-Style squats and side leg lifts require the inner thigh muscles to carry the load. Also, spinning is excellent (believe it or not). When you spin correctly, you always pull your knees to the middle of the so that your hips, knees and ankles stay aligned. Try it!
Submitted by CoachDrMichele
I've found many leg workouts that are really good for the inner leg on this website. Search in the leg workouts and pick out the ones that target this area.