SimilarWeb - SimilarWeb.com is a website analysis tool that gives you analytics information for any website.
Tile - Track your lost items
Website Informer - Website.informer: complete data lookup & free aggregated report on any domain including whois, visitors, IP & DNS details, competitors, owners, etc
The O - Never lose anything again
Site Rank Data - View historical rank information of websites via time series charts.
Tile Sticker - The small Bluetooth tracker that sticks to anything