The Extreme-clean add-on is one I have wanted for years. I had my own homegrown version, but unlike mine, Extreme Clean is, and so far, flawless. I had one issue with it, and the author pointed out some reasons why it may not be working properly due to my configuration, and indeed, he was right... so, support is great a well. Without question, this is a must-have add-on.

Having my customers purchase a license of 'Extreme Clean' has long been my first step when starting to work on a website. Using this add-on, I recently cleaned up a customer website bloated by over than 45,000 old page versions without facing even a hiccup in the process. Considering the developer's experience and his close tie with the concrete5 community, you cannot expect otherwise. Do not hesitate to run it on your site every now and then If you care about its performance.