SheepIt Render Farm - A free distributed render farm for Blender
RenderMan - Advanced Technology from Pixar Animation Studios for Rendering VFX and Animation
TurboRender - Rendering at your workstation?
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.
RebusFarm - RebusFarm is a 3D rendering software.
LuxCoreRender - LuxCoreRender is a physically based and unbiased rendering engine.