A place to centralize the great work @mathiasbynens did gathering and foster a community around finding and documenting OSX Default configuation from the command-line.

Want to see all, and I mean ALL of the Default values on your system? Open up your command line and type the following:

defaults read > ~/defaults.json

Just want the values for a specific application?

defaults read -app iTerm

(Source: https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man1/defaults.1.html)