I'm soon going to release a software package that lets people build their own games. I was wanting to allow people to make money out of the games they make using my package and not have to pay me royalties. I was wondering what sort of license Id need to do this.

If your software itself is free than I believe that MIT license would suit you just fine.

If you'll be charging for your software than I suggest you look at licenses of similar software.

Wicked. Thanks.