KnowEM is a free web application that lets you check the availability of a user name in the major social networking sites. To be precise, you can check for the availability of a user name in over 340 Social Networks by the virtue of few clicks.
KnowEm controls them all to see if the name you chose already exists or is unavailable. Using this web application is so simple, just enter the name you want to check in the box where it says Enter name here and click on Check It.
The various social networking sites are divided into different categories such as: Blogging, Bookmarking, Business, Community, Design, Entertainment, Health, Information, Microblogging, Music, News, Photo, Tech, Travel and Videos.
If you are interested in a particular category, simply click on “Check This Category” button beside the category name and you’re done. If the name is available, “Available” appears as the inscription, otherwise the message will appear Available with a black line and gray (just like a deactivated link).
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