Hope I'm not breaking the rules by posting this suggestion, as it implies cloning another company's module. If this is forbidden please accept my apologies.
I'd like to suggest an idea for a module for future consideration. A Domain Reseller module, similar to the one offered by Web-Expert.gr at: http://web-expert.gr/en/whmcs-addons/whmcs-domain-seller
I expect to pick up their module in May, but would re-purchase a simular module from Module Gardens if you make one in the future. The reason I am suggesting this is because I'd love to have a module like the one described, that works seamlessly with DNS Manager for WHMCS.
Nuts and Bolts of the module:
"The WHMCS Domain Seller is an automatic Domain Reseller System that allows the "communication" with two or more WHMCS." (Quoted from their site)
It allows you to provide a WHMCS module to other WHMCS owners so they can resell domains from your website. IMO it is ideal for smaller resellers operating in countries where it is difficult to find a mainstream reseller for the local TLD. Obviously it would be of little interest to many WHMCS users, but my company has many African clients, and we plan on expanding our lineup of African TLDs.
Thanks for consideration. If this post violates the rules, please delete it, but consider the idea.