Playtomic is a set of client and server APIs for game leaderboards, user generated content, and dynamic updates. It began as a hosted service providing tools and analytics for game developers, but is now available for developers to operate on their own. It includes the API server which is written in NodeJS and backed with MongoDB, along with game client APIs for HTML5, Flash, iOS, Android, Windows, and Unity3d games.
jMonkeyEngine is a game engine made for developers who want to create 3D games following modern technology standards. The framework is programmed entirely in Java, and aimed at wide accessibility and fast deployment to desktop, Web, and mobile platforms. It is not a visual “RPG Maker” or a drag-and-drop “FPS mod”. If you are comfortable writing Java code, you can rely on jMonkeyEngine as your next 3D game’s foundation.
Open RPG Maker is a 2D RPG creation utility, similar to the popular RPG Maker series. It is mostly based on RPG Maker 2003, but with some added features and more advanced usability. It allows users to create games similar to the original Final Fantasy games, such as FF5 and FF6, though it also supports Zelda-like games. Compared to the RPG Maker series, it supports additional image and music file formats, and 32x32 tiles of up to 24bpp instead of 16x16 8bpp.