Johannes Beus
I put up three tools at
tools.sistrix.com which, until now, were only in use internally:
Keyworddensity shows the absolute number and the relative frequency of keywords for a website. A number of stopwords, like and, or, the are knowingly ignored during the evaluation.
HTTP-Header tool to show the HTTP-Header of a website. With this you can check if redirects return the correct status-code for example.
Botview shows a website just the way searchenginerobots will see it: without Javascript, Flash and graphics.