I wondered if there is some easy to use Software-Center in Debian as well. (You can search and install software easily with it.)
Software Center
The program can be used to add and manage repositories as well as Ubuntu Personal Package Archives (PPA) and on Ubuntu, the Ubuntu Software Center also allows users to purchase commercial applications.
Best Answer
There is a version of Software Center in Debian 7: https://packages.debian.org/wheezy/software-center However, it does not offer commercial software.
That package is not available in Debian Testing or Sid. Interestingly, the Gnome package "Software", which is the same kind of gui affair is marked as being "not in Debian" for Gnome 3.12.