Shotgun Applications:

tk-jbd-submit-mayaplayblast

Documentation
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Maya MSide:

I've recently put together a bit of a PySide UI helper for creating QMainWindows using yaml config files.

If this is of interest to you, and you're a bit prone to living on the daring side, grab the repo from here pre it's release;

https://github.com/jamesbdunlop/MSide

This is a look at an example UI created using the MSide engine and a yaml config file

MSide in action

You can check the documentation HERE