When we release ColdFusion Builder 2, we'll also be releasing a free lightweight version of the tool called ColdFusion Express. Here is the description as per the the engineering manager:
When you start ColdFusion Builder, you are prompted to enter the product serial number. When you enter a valid product serial number, activation happens in the background the first time the software detects an Internet connection.
If you do not enter the product serial number when you start ColdFusion Builder, you can use the trial version of the full-featured ColdFusion Builder 2.0 for 60 days. After the trial expires, you need to purchase a license to continue using all the features. If not, ColdFusion Builder switches to a feature-limited Express Edition. With the Express Edition, you can continue to use ColdFusion Builder with basic features such as editor, code assist, and syntax highlighting. But the key features such as code assist for extensions, code insight, extension callbacks, connection to remote server, quick fix, debugging remote projects, refactoring, ColdFusion search, code formatting, FTP support, log viewer, local file browser, code hyperlinks, and hover help are not available in the Express Edition of ColdFusion Builder. You can convert the Express Edition to a full-featured version by purchasing the license and specifying the product serial number.