StatCounter.com
I‘ve just started using StatCounter.com. At first use, it‘s great! I‘ve added tracking now to most of my personal sites. The use of the service is free (you have option to upgrade and give them money if you‘d like (and, if I continue to be pleased with the site, I just might)). What puts it above other free counter sites (for me), is the ability to track multiple sites (projects) under the same account. So far, so good!