@mrnfrancesco said:
I developed a tool to enumerate subdomains by using search-engines.
Give it a look on Github at GitHub - mrnfrancesco/yass: YASS (Yet Another Subdomainer Software) is a plugin-powered search engine based subdomainer.
the domain feature iv seen before, it is a really versatile way of getting interesting results and often a lot of context, is there by any chance support for enumerating via the webserver ? 
Sorta like the wfuzz exampe