Please note that you are downloading alpha-stage, pre-release software, tested on a limited set of machines and provided as-is, without warranty of any kind. Please review the EULA included in the BDK packages.
The BDK alpha is free, for non-commercial and commercial use. We do however require you to provide your email address, so we can contact you about major updates, additions, and your use of the software. You can revoke this permission at any time.