Probably not as relevant to you as it isn't cardio, but I have free weights, elastic bands, an exercise ball and a mat. I work with the weights a couple times a week. I do a day or two of lighter core work. I use the elastic bands for rotator cuff rehab exercises. The exercise ball I got to mix up the core work a bit. I did crunches on the ball yesterday and got nauseated from the slightly odd motion it created. Yuck.

We have an old Schwinn Airdyne exercise bike (our fixie ). I have used it when it rains. I hate it, hate it, hate it.