If you have access to a lot of free apples, you can easily make cider from them. Any apples will do, but they should be as ripe as possible. This instructable shows you a simple method that does not require any special equipment.
Update Oct 2014 - In response to popular demand, I have just published an extra Instructable about how to make the press in step 4. Just wood, a few plastic containers and a car jack - cheap but very effective :)