Moniitor is a FREE website stat monitoring tool, it will allow you to monitor multiple sites and check for stats such as Pagerank, Alexa Rank, Feedburner Subscribers, Twitter mentions and more... Moniitor allows a quick overview to your sites web presence and performance and can be a tool that will save you time, especially if you have a number of sites.
"Popuri is a free analysis tool to find the popularity of webpages. We collect and evaluate data from the areas links, social networks and social bookmarks."