The package resource list is used to locate archives of the package distribution system in use on the system. At this time, this manual page documents only the packaging system used by the Debian GNU/Linux system. 

This control file is located in /etc/apt/sources.list 

The source list is designed to support any number of active sources and a variety of source media. The file lists one source per line, with the most preferred source listed first. The format of each line is: type uri args. The first item, type, determines the format for args. uri is a Universal Resource Identifier (URI), which is a superset of the more specific and well-known Universal Resource Locator, or URL. The rest of the line can be marked as a comment by using a #.

For more information, open terminal and type following command :
man sources.list

 By default, KALI linux has only one source URI in this file which do not provide wide range of softwares. To get better support and softwares continue to next steps.

Open the file in your favourite editor :

nano /etc/apt/sources.list

and paste the following lines :

## Security updates
deb http://security.kali.org/kali-security kali/updates main contrib non-free
deb http://archive.cloudera.com/debian squeeze-cdh3 contrib
deb-src http://archive.cloudera.com/debian squeeze-cdh3 contrib
deb http://security.debian.org/debian-security squeeze/updates main
deb http://http.kali.org/kali kali main contrib non-free
deb-src http://http.kali.org/kali kali main contrib non-free
deb-src http://security.kali.org/kali-security kali/updates main contrib non-free

Now, update the repository :

apt-get update

Now you can install a lot of softwares and application using apt-get install command.

Thank you :)