Domain names of .work and .casa belong to new TLDs. Now I would like to introduce you a way to register them free of charge.
You are allowed to get 10 free .work and 10 free .casa domains for a limited time.
Pay attention: ".work" does not equal to ".works". Of course, the first year registration is for free, while renews at $5/yr thereafter.
Enter the site: https://www.mindsandmachines.com/
Search for your wanted domain names. Seeing the tip "Good News, your domain name is available!" with the price $1.29/yr, you can add to cart and checkout now. Discount applied at checkout. Just sign up an account if you do not have one. Well, when signing up an account you need to verify your phone by receiving a SMS.
Also, there are some names, such as three-letter names, called "premium names" that you cannot get for free. You are supposed to pay $50.00/yr for it if you want to.
Offer ends June 15, 2015.