I’ve started Sitemetrics.org as a weekend project which aims to track SEO and Social-Media activities of businesses. For the time being I’m only including the companies in Holland.
Metrics are to be updated once a month. The information published on this site is publicly available and free. I’ll be maintaining and adding more APIs as I find time.
Please don’t hesitate to send an email with suggestions to improve and make this a more useful tool: firstname.lastname@example.org