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.
One of the most difficult aspects of any analytics implementation is that often the person setting up the analytics has no ongoing access to the back end of the website; this makes adding tracking codes and making changes a potential challenge, as you may need to navigate different teams and site stakeholders in order to get anything done.
I'm a digital marketer living in Victoria, British Columbia.