How to have users submit crash logs for PC/MAC standalone builds?

I’ve recently used a program to automatically upload crash logs from projects running on iOS devices. I was wondering if there is a similar solution for PC/MAC standalone builds. This would be great for tracking issues that are causing crashes for my testers.

Does anyone know a free plugin or an easy way to do this myself?

Due to the crickets, I did some more research and found someone who followed a similar approach. The one piece that I was missing was where to intercept the writing to the log. This blog post deserves the credit. Entity Crisis: Error Reporting from your Unity3D game.