SortSite

SortSite is a web crawler that scans entire websites for quality issues including: accessibility; browser compatibility; broken links; legal compliance; search optimization; usability and web standards compliance.
Tests, Standards and Checkpoints.
Quality tests run on each page include:
Reviews.
The product has received reviews in Website Magazine and Softpedia. The vendor maintains a list of current reviews on their website.
A list of problems commonly encountered by users is provided by the vendor in the SortSite FAQ.
Licensing.
SortSite is commercial licensed software which uses serial numbers to prevent unlicensed usage. Standard licensing is per-user, but pooled floating licences are also available at extra cost.