Free surf from My-Addr Project, tested on my simple sites. Good methods for check if your site is online.
A client connects to the proxy server, requesting some service, such as a file, connection, web page, or other resource, available from a different server.
It is a bulk alexa rank checker service.
Alexa ranks sites based on tracking information of users of its Alexa Toolbar. This bulk alexa rank check will be useful for domain popularity checking.
Hosted whois api tools for requesting parsed and raw infomration about domain name. This whois database api will be useful for domain monitoring and managment.
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Online Fake PageRank checker util, that allow to check pr of urls list and validate it.
This tool will be useful to domain buyers. That valid pagerank checker assigns a numerical weighting and validity marker to each url.