nCine is described as 'Cross-platform 2D game engine in C++' and is a game development tool in the development category. There are more than 50 alternatives to nCine for a variety of platforms, including Windows, Linux, Mac, iPad and Android. The best alternative is LÖVE, which is both free and Open Source. Other great apps like nCine are Wick Editor, Ren'Py, Defold Engine and ENIGMA - LateralGM.
The Wick Editor is a free and open-source tool for creating games, animations, and everything in-between. It's designed to be the most accessible tool for creating multimedia projects on the web. Your creations can run on any device with a web browser - that means mobile too.
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D engine that enables developers and content creators to build AAA games, cinema-quality 3D worlds, and high-fidelity simulations without any fees or commercial obligations.
Cocos Creator is a complete package of game development tools and workflow, including a game engine (based on Cocos2d-x), resource management, scene editing, game preview, debug and publish one project to multiple platforms.
One framework for creating powerful cross-platform games. The spiritual successor to XNA with 1000's of titles shipped across desktop, mobile, and console platforms. MonoGame is a fully managed .NET open source game framework without any black boxes.