Whos.it - Whois Domain Checker
This is the first project we've done on Laravel 3.
The code is pretty old but there is a good source of inspiration on how the whois protocol works. We integrated 99% of the TLDs that existed at the time of writing this app, from classic TCP whois queries to complex HTTP
If you're interested in buying the domain name you can reach me at hello [at] deiusoft.com