#1 Bulk PageRank Checker is a professional program for checking very large lists of URL's for Google PageRank. You can easily check more than 10,000 URL's without getting blocked. It offers two different sophisticated anonymization options.
SitePopularity will check any number of websites for the most important ranking criterias such as Google Pagerank, Alexa Traffic Rank, Dmoz listing and links from other websites. SitePopularity features advanced functions, yet it's easy to handle.