I’m not sure about you but I find Mac OS X’s warning dialogue when I have downloaded a new application really annoying.
I understand that Mac OS X displays these warning dialogues to the user as a security reminder but my downloads are generally from trusted sources.

To disable these internet warning messages you can use the mighty Onyx.
1. Navigate to Onyx
2. Click on the “Parameters” button then the “General” tab
3. Tick the checkbox “Remove the alert message on first launching applications downloaded from the Internet”

IMPORTANT: If you disable this option – make sure all your downloads are from trusted sources.
NB. Amsys is not paid to endorse Onyx – we just love the product.