Of the four tools offered, these two made the most sense:

• “Google Analytics Report Enhancer by RoiRevolution. Brings up tens of new reports in Google Analytics. It also calculates for you “True Time on Site”, which is the average time spent on site, excluding all bounces.
• Google Analytics Downloader by Juice Analytics. Adds a highly valuable button to your keywords and referrers reports, stating who sent you unusual traffic. Really great info can be brought out of it.”

On that post there’s also a link to Avangate’s Analytics miniBible for Software Vendors which is well worth reading. I was introduced to Avangate by Adriana Iordan who began following my Twitterfeed at the Business of Software Conference in September.  Check out the article I wrote on that conference at Bostonist.