Loom SDK is described as 'The Loom SDK is a great mobile game and application framework' and is an app in the Development category. There are more than 10 alternatives to Loom SDK for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and Windows Phone. The best alternative is Godot Engine, which is both free and Open Source. Other great apps like Loom SDK are Construct 2 (Freemium), Stencyl (Freemium), MonoGame (Free, Open Source) and Arcade Game Studio (Free).
10Duke SDK is a rapid application development (RAD) kit for creating new online applications; it provides a modular, reusable set of libraries designed to meet the challenging requirements of online applications.
UrhoSharp is a lightweight Game Engine suitable for using with C# and F# to create games and 3D applications. The game engine is available as a portable class library, allowing your game code to be written once and shared across all platforms.
A game-engine fully integrated in Blender UPBGE is an open-source, 3D game engine forked from the old Blender Game Engine and deployed with Blender itself. This unified workflow is its main strength, as you can make your game from start to finish without leaving Blender.