Google Advertising Professional
The Google Advertising Professional program was...
Designed for professionals who currently manage or want to manage multiple AdWords client accounts, the Google Advertising Professionals program can help you become a more successful ad manager – for free.
You have to comply with their rules, spend at least $1,000 in a 90 day period, and pass a test. The test costs $50 to take. Wonder how it helps you make more money for free when the test costs $50? ;) Google AdWords Learning Center
Google has a bunch of free tutorials and quizes which can help prepare you for their test.
Google AdWords Test
I just took the test and it was 104 multiple choice questions. I was given 1.5hrs to take the test and was required to get a minimum score of 75%. A few of the questions are a bit confusing but most of them are rather easy. If you know much about AdWords you should be able to take the test in under an hour.
After you pass the test and spend enough money on AdWords you can get your shiny Qualified Google Advertising Professional Logo
Google Advertising Professional FAQs
There is a large online Google Advertising Professionals Support FAQ section as well.
My Client Center
Allows you to link together up to 500 AdWords accounts and access them from a single login.
New AdWords Tools
I have not tried either of these out, and neither are officially endorsed by Google in any way, but a few newer bolt on AdWords tools are AdWord Accelerator and AdGooroo.