I think you'll just have to get creative. I would advice first to check out "killer home workouts", "killer bodyweight leg workouts" etc on YouTube and google. These workouts exist and there are tons of these used by those learning Karate (we used to do very hard knuckle push-ups) and other stuff so I'm positive it's a matter of a good Internet search.
I had to quit the gym too so I got some dumbbells (some I had), Olympic barbell, a cheapest bench, exercise ball and some plates. I do pull-ups on the door thing, a variety of pushups, squats, one leg calf raises on the stairs or plates, jump the rope in various intensities, weighted crunches and so on...But yeah, I've got those dumbbells. In any case try variety of pull ups and running up the stairs etc. Whenever I run out of ideas, I Google or YouTube.