Frame Warden Homepage (http://www.framewarden.com)
It includes features such as:
Renders based on the render outputs set inside a Modo scene
Queue List saving on shutdown and startup
2 render group options per SCENE
2 render group options per NODE
Mac Universal and PC versions are available
Overdue frame detection/redistribution
... and more! With much more planned in future updates!
Updates planned in the short term include:
Utilization of Modo's bucket rendering system to render still frames
Clients being able to set themselves as a login item
Integrating with the headless Modo when it's released
Rendering layered formats such as EXR and PSD
Get the 100% FREE 2 node version and give it a try and let me know what you think.