Those of you who don't belong to a gym....

Free weights and resistance bands.

http://www.greatist.com/fitness/50-bodyweight-exercises-you-can-do-anywhere-030612/

A set of resistance bands can be surprisingly useful, especially if you know how to do strength-training exercises. I mostly just do push-ups and squats, but the only way I can work my back is to do rows and pull-downs with resistance bands.

A man may find them not enough resistance, but I don't have that problem. My bands use clips and handles and a door-stop-thingy, and if I use more than one band at a time, they can be pretty strong/heavy.

http://www.myfitnesspal.com/groups/home/3772-women-beginner-strength-training
http://www.myfitnesspal.com/groups/home/771-women-strength-training
http://www.myfitnesspal.com/groups/home/102-new-rules-of-lifting-for-women-nrol4w

Firm dvds. Love them!

I have kettlebell's, bosu ball, and a jump rope. I do lunges and squats. If I do not know how to do something or if I want to find a new exercise I surf youtube and watch that. I have a gym membership but only use sometimes. I just got Insanity last night and that is my next challenge

I love this website:

http://www.strength-training-woman.com/strength-training-exercises.html

Most of the exercises detailed require minimal or no equipment, and can be adapted based on what you have available.

Stephyshoes I love you! This is a great link! I've never done strength training before because i thought of myself as "strong enough" - but I feel now that it's a great way for me to move towards a healthier body.

I do yoga and walk. I guess the yoga could count as a gym for me because I pay for it. I don't thnk you need a gym to build muscle or to lose weight. There are lots of options on TV. You can even get dvd's at the library:-)

"You Are Your Own Gym" by http://www.marklauren.com/

I've got the book and the iPhone app. The exercises can be done with body weight and some common household objects.