o2 - it's an open-source technology for easy making 2D games and applications for mobile and PC platforms using C++ and JavaScript with visual editor. The main features are performance, usability and effective development.

Here is the test project: https://github.com/zenkovich/o2-Template

Now work in progress.

Discord channel - https://discord.gg/FqBBYpYGfS Telegram channel - https://t.me/o2engine

• Assets
  Automatic assets building and converting, automatic atlases packing, easy to add to project, flixible configuration.

• Scenes
  Component-objects based scene graph, nested prototypes and good integration with editor

• UI
  Fast and flexible UI system, a lot of default widgets, styles, integration with scenes

• Render
  Easy to learn rendering system with meshes, fonts, sprites, culling, shaders and render targets.

• Sound (WIP) Playing sounds, music, streaming sounds, audio mixer

• Animations
  Animate everything, retargeting, easy to serialize, layers, weights, IK, animation state machine, mesh skinning, editor integradion

• Effects
  Particle emitters with different forms, particle effects, editor integration

• Physics
  Rigid bodies, colliders, joints, effects

• Input
  Multiplatform input processing, easy clicks and touches processing

• Platforms Windows, IOS (WIP), Android (WIP), MAC OSX (WIP), Webassembly (WIP)

• Scripting JavaScript on jerry script engine

• Editor
  Flexible editor "all-in-one", plugins