Which web apps do you use on a regular basis?

Which web apps do you use on a regular basis?   Delicious Digg drop.io Facebook Flock FriendFeed Google Docs Google Reader iGoogle Kayak	LinkedIn Mint Mixx Motionbox Myspace Posterous Reddit Skype Slideroll StumbleUpon	Tripit Tumblr Twitter Vimeo Vox Yahoo! Buzz Yelp* YouSendIt YouTube Zoho
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