EtreCheck is a simple little app to display the important details of your system configuration and allow you to copy that information to the Clipboard. It was designed by an Apple engineer, and is meant to be used with Apple Support Communities to help people help you with your Mac.
It’s a nifty little utility that will list every daemon, launch agent, kernel extension and plugin running on your system, as well as some other insightful information. It’s like having a Apple Genius living inside your Mac. The app really does nothing you can’t do with the Terminal, but it makes it much easier to read and decipher.