I\'m trying to test Coldfusion for learning purposes, but I really don\'t know what is the aditional features that the non-free Enterprise Edition add to the free Developer
The key is the line: "Used for delivering multiple websites and applications on one or more servers"
The Enterprise Edition allows for deployment for commercial purposes.
The Development Edition allows you to develop locally, but not deploy. The deployment requires Enterprise or Standard editions, or purchasing a hosting solution which handles the licensing for you.