The Ubuntu Software Center is all the way on the bottom of the “Applicatons” tab. Click on it, and you’ll get to the following screen:

There are thirteen categories where you can find most of the synaptic packages and software available to Ubuntu. If you click on “Get Software” on the left you will be provided with several other categories. “Provided by Ubuntu” which hosts most of the application and then “Canonical Partners” where I found only two applications and that is Adobe Flash and Adober Reader. Both available for immediate download and install, I remember I used to have to navigate to the Flash download page and download it manually. The categories are: More >