There are numerous exercises that you can perform at home with absolutely zero equipment, just a small amount of knowledge and motivation is all you need.
Some of the exercise will have the use of a step box, and the workouts will include exercises from other areas of the site that will require the use of small hand weights (dumbbells).
It's worth looking at all areas of the site for other exercises, as each muscle group will have a complete selection of exercises for you to perform with either your bodyweight or suitable dumbbells.