OEngine is a multiplatform C++ engine with an WYSIWIG editor. It's made to be very flexible, and has been used in many internal prototypes, and is currently used by two games in two companies: - White Night (OSome Studio) - Space Run (Passtech Games)
Post Effect system can combine different styles in a single screen, like here you can find
- a toon shading
- black and white dither
- subtle light effects at the same time