Which particular Peak Open Projects feature do you use the MOST?

We are interested in the habits of our users... and also want to celebrate the Peak Open Projects

PeakD.com has implemented many features that come from the team over at @peak.open projects and we want to know which ones PeakD.com users have used the most?

Now that some tools just got released we want to know which ones you use the most in a given month considering the addition of the new projects.