In case you don't like Xmarks for some reason, here's an aptly-named alternative:
- Similar Sites
http://www.similarsites.com/sites-like/{domainName}
- http://whatsmyuseragent.com/
- http://whatismyipaddress.com/
- http://www.internettrafficreport.com/
- http://www.speedtest.net/
- Back to front page
{domainName} - Back to root domain
{baseDomainName}
- Google News
http://news.google.com/news/search?cf=all&ned={locale}&hl={baseLocale}&q={countryName} - BBC News
http://search.bbc.co.uk/search?q={countryName}&tab=ns&scope=all
- Firefox Support
http://support.mozilla.com/search.php?where=f&q={domainName}&sa=Search - Mozilla Bugzilla
https://bugzilla.mozilla.org/buglist.cgi?quicksearch={domainName}