Microsoft have confirmed that Project Spark, the free-to-use creation tool for Xbox One, is getting a content-packed Year One Edition bundle which will be released today.
http://www.purexbox.com/news/2015/07/project_spark_year_one_edition_collates_all_add-on_content_for_a_single_price
Since its launch last October, Project Spark has gradually—and quietly—grown into a sizable community of would-be game designers and creative gamers. Today, makers of the Project Spark announced that the game creation platform has been installed a solid 3 million times. Players have shared over 150,000 of their creations, which have been played nearly 15 million times.
https://www.pixeldynamo.com/news/gaming/2015/07/28/73866/project-spark-boasts-3-million-installs/