If "Free" is you thing, how about "Free Will". I like it over "Free Spirit" or "Freedom". There may be bands with these names, I don't know.
If you wanted to venture away from the "Free" thing, I think there are a few things you should consider. Don't pick a name that is similar to an existing band. New listeners, radio stations, etc. may get you mixed up with another group and request or play thier songs instead of yours.
Don't pick a name that will put you in a time warp. Such as, Jefferson Airplane that later changed their name, etc.
Don't choose a name that is too provocitive. This may prevent parents from allowing there teens to purchase your songs. And usually, the parents are the ones with the money!
Choose a short, but to the point name. I wouldn't go with a name more than 2 short words. This fits on the CDs well and it is easy to remember.
And don't pick anything too creative like "Dusty Rhodes" or "Missing LynX". Although, I sort of like "Missing Lynx".
If it hasn't been used, I like "Free Will"!!