Domainrr.com Domainrr is a free online web application where you can store all of your information for your domains. If you're like me and have loads of domains in different places, this is the perfect web app for you! You can store domains, dates, registrar details and more. You can export domains into a .txt file, included which is the domain information. This can be used for a for sale thread. You can view the video to the right to see a working preview video. Domainrr is part of StartedWith100.com - A blog where we started with 100 dollars and see how far we can get in the web world.