Is there a domain management add on for Cpanel? I could not find one. I saw Host Monster and Blue Host both have a nice domain management. If Cpanel can not do this, is there a script that does? area of course these 2 are the same company so it may be custom?
cPanel does not have any feature supporting domain management but as hostliger suggested you can use a third party software such as WHMCS, CE, and a lot of others available in the market. You might contact a developer who can build a cPanel plugin for you to integrate with cPanel.