MalcolmX is a cli to instantdomainsearch.com, it allows you to check if a given set of domain names are available. To start using malcolmx install it via rubygems, and start using it like this:
malcolmx cosmicvent minhajuddin myfunkyfreakydomain
You might be wondering, why I have named this tool MalcolmX. The reason is very simple, MalcolmX was one of the greatest human rights activists. I greatly admire him, and this is a small way to make his name known, to people who don't know him. If you liked using this tool, please take a look at his wikipedia page.