Decker is a multimedia platform for creating and sharing interactive documents and adventure games with sound, images, hypertext, and scripted behavior
Capsule VN Engine is a lightweight, no-code game development tool designed for the creation and distribution of 2D visual novels using web technologies.
anitya is offers a low-code software toolkit designed to empower creators brands to effortlessly develop immersive 3D experiences, including gamified training modules, collaborative workshops, and e-commerce solutions.
A no-code game maker that runs right in your browser. Flowlab makes it easy to get started making your own games. Publish your creations as iOS or Android mobile apps, or export for PC & Mac.
AllBinary Game Engine is a multi-platform game engine in Java. Entire game engine is also in 100% Kotlin. Supports: Android (Without native libraries in Java or Kotlin), HTML5, J2ME (MIDP), Windows Native (Avian), and J2SE (Java or Kotlin).
Easel lets you code multiplayer games without coding the multiplayer. Code like all your players are in one shared world, like a singleplayer game, and Easel does the rest.
Flickgame is a game-/story-/thing-making tool. You have sixteen frames, sixteen colors, a few brush sizes, and the means to link together frames via the color menu.