Microsoft is a technology company that develops and sells computer software and consumer electronics including computers. They make Windows, the world's most commonly used computer OS.
Gamefly is an online service for buying, renting, and playing games and movies, new and old, for less.
iTunes is Apple's media store, selling songs, albums, books, audiobooks, movies, and TV shows.
Loot Crate is a subscription box service founded in 2012. They focus on geek and gaming merchandise.