Site2pic - this web domain tells you what it doing. Take screenshot to website. Just type a web address, one click all done.
My Open Letter - lets you to write open letter to anyone, it will publish with individual address.
Youtube-MP3 - download, convert video file to MP3 audio file from Youtube.
3Defy - a cool site that lets you take a look photo in 3D mode. You can also make image file that can be view in 3D mode with a web link or upload file from your computer.
Serendip - a new social music site, still in beta version, invites only.