Several months ago I quit the gym (fitness should be free, right?). While I can still get all the cardio I want from cycling and swimming, I do feel like I miss out on resistance exercise. So how do I get a good strength training workout without a room full of barbells and free weights?
Pick the Brain just posted a strength-training workout that you can do at home without weights with a link to a training program. The workout is based around pull-ups, push-ups and squats.
Now I’m faced with a common problem: there’s no way in hell I can do a pull-up. So how do I workout my back without free weights or a barbell? Any suggestions?
Link

Seems like a pullup thing and a resistance band might be in order.
http://www.simplefit.org/pullup.html
Body row: Put a towel or rope over the bar and pull yourself on a horizontal plane, changing the angle varies the resistance. Rings are also good for body rows.