SheepIt Render Farm - A free distributed render farm for Blender
TurboRender - Rendering at your workstation?
RebusFarm - RebusFarm is a 3D rendering software.
SuperRenders Farm - SuperRendersFarm.COM is a CPU & GPU cloud render farm, supporting all 3D Render Engines: Arnold, Redshift, Octane, Vray, and more.
GarageFarm.NET Render Farm - GarageFarm.NET Render Farm is a major cloud render farm that can easily connect with your 3D solution to automate the rendering process.
RenderFarm - Fast, affordable, great customer service and manual check-up of your scenes on request!