LuxCoreRender - LuxCoreRender is a physically based and unbiased rendering engine.
Cycles Renderer - Cycles is Blender’s ray-trace based production render engine and in development since 2011.
V-Ray - Learn why V-Ray for 3ds Max’s powerful CPU & GPU renderer is the industry standard for artists & designers in architecture, games, VFX, VR, and more.
RenderMan - Advanced Technology from Pixar Animation Studios for Rendering VFX and Animation
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Indigo Renderer - Indigo Renderer is an unbiased, physically based and photorealistic renderer which simulates the physics of light to achieve near-perfect image realism.