Update: GameMaker Studio Standard is now 100% free.
GameMaker Studio version 1.2.1214 was just released, and with it comes an offer to upgrade to the Standard edition free of charge. Valued at $50, GameMaker Studio Standard is a significant improvement upon the free version of the software which imposes harsh restrictions on the resources that developers can make use of.
Additionally, developers can use their free Standard edition license to upgrade to the Professional edition for only $50 more. It’s likely that this is a time-limited offer, so if you’re using the free version of GameMaker Studio be sure to act quickly.
Your browser is the console, your phone is the controller.
Brass Monkey is video game console that uses smartphones as controllers and any screen with a web browser as the main display. Brass Monkey provides a free SDK (software development kit) that lets developers create games with similar features to traditional consoles (XBox, PS3, Wii, Wii U, etc.) using tools for creating Web based games: HTML5, Unity and/or Flash.
GameMaker: Studio caters to entry-level novices and seasoned game development professionals equally, allowing them to create cross-platform games in record time and at a fraction of the cost! In addition to making games development 80 percent faster than coding for native languages, developers can create fully functional prototypes in just a few hours, and a full game in just a matter of weeks.
Polycraft is a 3D action tower defence game.
Topdown tactical RPG roguelike game and game engine. Tales of Maj’Eyal (ToME) is a free, open source roguelike RPG, featuring tactical turn-based combat and advanced character building. Play as one of many unique races and classes in the lore-filled world of Eyal, exploring random dungeons, facing challenging battles, and developing characters with your own tailored mix of abilities and powers.
JavaScript Graphic Adventure Maker is an open source Javascript game engine focused on classic graphical point-and-click adventure games.
SGDK2 is an integrated development environment designed for developing multi-layer scrolling tile-based games. It includes integrated map editor, graphics editor, code editor (although coding is not required), and much more.