Get Yourself A .NU Domain for free: directregister.com

How you can utilize:

1. Can Make URL Shortners.
2. Can use as Affiliate Links
3. Landing Pages
4. A/B Testing Sites

Tips:

1. Can enter F.A.K.E Details. while signup (Don't forget to enter real email).
2. Can buy more domains by making more account. Don't forget to change the IP and Clear Cookies.
3. You can change DNS by requesting the Registrar in Support Center. Just make new Ticket.