This tool lets you customize random numbers!

WebGL Demo | Instructions

Using procedurally generated content? Would you like easy, visual control over the random numbers you use?

"Weighted Random Numbers" lets you edit the statistical distribution of the numbers it generates using a Unity AnimationCurve. This gives you control over both the range and the weighting of the random number output: Would you like higher numbers to be more likely than lower ones? Simply adjust the curve.

This random number generator makes a distribution curve your game design tool.