The products which support plug-ins can be extended with more features via free and commercial plug-ins. Several plug-ins are currently in development.

Free DirectX plugin for Smart Packer Pro
This free plugin checks if DirectX 9.0c is installed and aborts when it is not available. After downloading just fill out the plugin filename and procedure (IsDirect9cInstalled) in Smart Packer Pro. Download the plugin here.

Soon available!
There will be more free and commercial plug-ins in near future.