I do a modified version of Stronglifts 5x5, which is a weight lifting program using primarily the barbell and power rack. My modifications:
- I switched to 3x5 after experiencing some stalling at 5x5
- I do inverted rows instead of barbell rows
- I do pull-ups/chin-ups/push-ups as in the old Stronglifts program
- I am in the process of changing the ab exercises to better fix my anterior pelvic tilt and belly that protrudes, even ignoring the fat.
I have been on the program for 4.5 months and I am pretty happy with my muscle gains. I gained muscle and lost fat simultaneously, at least in the first couple months. Don't be afraid of the barbell - you start out with bodyweight or just the bar, and progress at your own pace. There's very little risk if you take it slow!