Facebook, Twitter, Google, Dropbox, and all the other web services out there can be accessed by various applications and other services. Here’s a couple of links that you can use to quickly remove anything that has access.
Your Google Account
Perhaps the most important of your accounts is your Gmail or Google account. You can use the following link to see every app and service that has access to your account. Once there, you’ll see a list like the picture above, which you can quickly clean up if you so choose.
(Click all links, they are live)
https://www.google.com/accounts/IssuedAuthSubTokens
Your Facebook Account
Visit this link to access your Facebook settings page, where you’ll see a list of everything that can access your account. Click the X next to any app or site to delete it.
http://www.facebook.com/settings/?tab=applications
Windows Live (Hotmail, Messenger, etc)
This link does the same as the rest, just for Windows Live.
https://profile.live.com/Services/?view=manage
Dropbox
There’s a lot of apps that can use the Dropbox API, and you should clean up this list.
https://www.dropbox.com/account#applications
Twitter
You’ll be surprised how many apps have access to your Twitter account. Time to prune that list.
http://twitter.com/settings/connections
Yahoo, LinkedIn, Flickr, Instagram, Foursquare, and Flickr
For all the rest, you can go to
MyPermissions.org and click the icon directly from their page to get to the settings page for that app.
Thanks to "The geek"
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Guys I was shocked by just how many sites and junk have access, especially through Facebook....I've done a through clean up.... I would advise you to do the same and report what you find....
The "Net" is getting smaller!, no wonder we all receive so much junk mail! 
IMPORTANT:Clean List Apps that Access Your Accounts
PUTIN TRUMP & Netanyahu Will Meet in HELL
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