Sling Freestream is a new free streaming service that offers a variety of TV shows and movies, including The Walking Dead Universe channel. Users can sign up without providing credit card information and access content on various devices. The service also offers live programming and has over 210 free channels, covering genres like drama, reality, and romance. Additionally, Sling Freestream provides classic TV shows and short format compilation video channels. Overall, it offers a range of content in one convenient service.