Info
This tool select polymesh components based on "Edge Angle",i.e. angle between normals of 2 polygons sharing this particular edge. Non-manifold geometry is not supported (meshes with edges sharing more than 2 polygons).

Features
- Handy interface
- Fully interactive. Tweak controls and immediately see results in viewports.
- Replacement of Maya's not working "Select -> Select Using Constraints... -> Geometry -> Angle"

Installation:
Put this script in your PYTHONPATH directory.
In Maya, run this script by typing in "Python" tab of Script Editor or make a shelf button containing:

import fx_selectComponentByEdgeAngle

fx_selectComponentByEdgeAngle.run()