Two more entertainment apps are available to download off Xbox Live today: the Crackle app from Sony Pictures and CinemaNow from Best Buy.

CinemaNow allows Xbox Live Gold members to buy and rent movies and TV shows. (Why anyone would do this instead of using the Zune Marketplace, we're not entirely sure.) Crackle offers "thousands of full-length movies and TV shows" for free.

Crackle is probably the most significant addition to the Xbox Live ecosystem. Its catalog includes movies, like Groundhog Day and The International, and TV series like Seinfeld and anime.

"In addition to these apps, we will continue to enhance and expand our global entertainment offerings on Xbox Live in 2012," a Microsoft representative told us.