For a quick overview of how a site’s SEO health we like Searchr, mainly because you don’t have to login! It tests your homepage against all the usual metrics and gives you a score out of 100. Bish, bash, done.
It’s great for reminding you to add a sitemap, robots.txt file and a favicon, as well as the usual meta stuff, so it’s a good early destination for sites being actively developed with SEO in mind.
We do actually login, because it’s free, the restrictions on casual users are removed, and we can access our bookmarks. Drive-by users can only test a site once a day, but registered users can test as many sites as they want, as many times as they need to.
It’s on our cool tool list, but it’s important not to forget that, although it’s measuring Moz and Google PageSpeed, Searchr’s SEO Score is just a number to help compare sites.