I found a blogpost which lists the projects or services Google launched but still unfinished or not made open to public. It’s title suggests that the lists reaches to 30, however when I count the list, there are only 28 services listed on it.

Anyway, if you want to see the list, visit Modded Up here.

• Sign up for PayPal and start accepting credit card payments instantly.
  As the world's number one online payment service, PayPal is the fastest way to open your doors to over 150 million member accounts worldwide.
• Promote your product to high quality, targeted websites and blogs.
  Find effective, influential blogs and highly targeted audiences to advertise.Choose to display your ad across entire blog networks to maximize your exposure to a wide audience.