This is probably only going to be useful to a handful of Blender users who work at studios with render farms that run Pixar’s Tractor render manager, but here goes anyway. 
I’ve written a small addon that lets you dispatch both Cycles and Blender Internal render jobs to Pixar’s Tractor.
You can find both the addon and documentation here.
Ragnar
p.s. My website that the wiki page links to just went down as I was writing this post, but will hopefully be up again soon. The link to the script file still works though.