GameMaker Studio is currently free to download

Newsbrief: The standard version of the GameMaker Studios toolset is currently free to download, allowing developers to bypass the free version's various resource restrictions. Usually the standard version of YoYo's GameMaker costs $50 -- however as part of the latest update to the toolset, if you boot up the free version of the tools and choose to upgrade, you'll find an option to grab the unlimited resources version for free. Game Maker Blog also notes that the Professional version of Game Maker is currently discounted -- if you grab the Standard version, you can then upgrade to Professional for $50. It's worth grabbing the standard edition quickly, as it's likely a time-limited offer.