The Wayback Machine Scraper is Google Doc that allows you to quicklypull page titles from URLs that no longer exist (i.e. 404 pages). Having page title information for your 404 pages can really help when you're wanting to redirect those 404 pages to their closest equivalent on your new site.
I've always wanted a quick and easy (free) way to check the sites I'm working on for missing Google Analytics code, so I decided to build a tool myself. Just put in your domain and let the tool do the rest. Export your results to a CSV for easy analysis.