Version 1.9.3 - Free
Read more about EtreCheck.
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 is meant to be used with Apple Support Communities to help people help you with your Mac.
EtreCheck automatically removes any personally identifiable information from the output.
EtreCheck is designed to run on OS X 10.7 “Lion” and above. People report that it works on 10.6 “Snow Leopard”, but some features may not report accurate, or any, results.