I personally do not use weights or bells with cf you do not really need any. To scale you can modify weight, intensity, or duration. How do you modify weight without equipment you ask? Body leverage ie change the angle of your pushups. Here is my current regimen.
five rounds for time
5 ring pullups
10 ring Push-ups
20 squats
As many rounds as possible in 20 min
3 ring pullups
5 ring pushups
10 squats
5x5 for time
ring dips
inverted pullups
Tabata 20 seconds on 10 off
8 intervals push-ups
8 intervals ring Pullups
8 intervals plank
8 intervals squats
There is no rest between exercises
5x5 for time
hand stand pushups
ring pullups
For Time
25 ring pullups
50 ring pushups
100 squats
I do one every other day
Rings
http://www.mensjournal.com/healthFit...k_pushups1.jpg
The ring exercises make bw stuff 2x as hard imo great for intensity I have a link to the rings if anybody is interested and home brew instructions as well they are really fun