hi i got easy step for install software like ubuntu software center
oke lets do it
First edit your repository
deb http://http.kali.org/ /kali main contrib non-freeCode:nano /etc/apt/sources.list
deb http://http.kali.org/ /wheezy main contrib non-free
save(ctrl+o) exit
second update the repository
third instal software centerCode:apt-get update
now you can run it on terminal with comand : sowtware-center , but i told u for make a shorcut in main menuCode:apt-get install software-center
open Aplication> > Accesories > Main menu > klik new item in right place
type Name : Software center and Command : software-center ,
then ok
http://img543.imageshack.us/img543/6024/f9k.png
look aplications menu, you will found software center