Came across this:
http://brturn.github.io/feeds-and-speeds/
and thought it was a nice alternative to the other options found thus far.
Online/opensource Speeds and Feeds Calculator
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Online/opensource Speeds and Feeds Calculator
Shapeoko 3XL #0006 w/ Carbide Compact Router w/0.125″ and ¼″ Carbide 3D precision collets