Skip Counting by 6 and Can be used as an outdoor activity where students have to jump, leap, hop, skip etc. through hoops laid on the floor. Students/teacher can write in chalk the starting number on the ground.
As the name suggests, this site provides links to the best multiplication apps out there. These apps include everything from drill and practice to learning new techniques with fun games. Although some of the apps require a payment, many of them are free.