These are some websites that you might not have heard of but are useful, clever and infuriating.
1.Midomi

It is a unique way to search music. Ever hear a song on the radio that has a nice tune to it but they never even say what it's called so you can go to www.midomi.com and just hum the song. You will get the name of that song.
2. Wolfram|Alpha: Computational Intelligence

Remember the Star Trek computer? It's finally happening--with Wolfram|Alpha. Building on 25 years of development led by Stephen Wolfram, Wolfram|Alpha has rapidly become the world's definitive source for instant expert knowledge and computation. It is an online service (www.wolframalpha.com) that answers factual queries directly by computing the answer from externally sourced "curated data",
rather than providing a list of documents or web pages that might contain the answer as a search engine might.
3. FutureMe: Write a Letter to your Future Self

Write a letter (www.futureme.org) to the
future: set goals for yourself, make a prediction about the world. Envision the
future, and then make it happen.
4. ifidie.org

if i die.org (ifidie.org) gives you a way to write notes that will only be delivered if you die. The service is free, easy to use, and completely secure. Use this website to leave instructions for what to do with your pets and journals, to write letters to the people you care about, or for anything else you want. It's not as morbid or scary as you think; it's an easy way to be prepared just in case something totally unexpected happens.
5. Stolen Camera Finder - find your photos, find your camera
stolencamerafinder (www.stolencamerafinder.com) reunites people with lost or stolen camera equipment by searching the web for the serial numbers embedded in jpegs.
6. Fix-It Club: Free Repair Help

The
Fix-It Club (www.fixitclub.com) offers more than
250 Free Fix-It Guides for repairing broken things around the home and garage: free repair help!. Occasionally you won't be able to or won't want to fix it yourself.
7. Sumopaint - Online Image Editor
Sumo Paint (www.sumopaint.com) is a full featured painting and image editing application featuring an active art community of over 570 000 registered members and over 2 000 000 images. The app has the web's most versatile collection of image editing features blurring the line between desktop applications like Photoshop or Gimp.
8. MyFridgeFood

MyFridgeFood (www.myfridgefood.com) is an interesting and definitely quite useful tool. It presents you with two options – quick find and detailed kitchen. Both these pages have check boxes representing various food items. Just check the ones which you’ve got in your kitchen and it’ll show a list of recipes you can make with some or all of them. Click on the recipe and get the cooking details. Hence a nice tool to quickly check what food you can prepare with the items you’ve have at hand. If you sign up, you can submit a recipe.
9. KeepMeOut

If you have an email or facebook addiction and find yourself checking them too often instead of doing what you’re supposed to do. Try KeepMeOut.com. It is an online application that can help you overcome addiction of visiting certain websites (Gmail, Facebook, Digg, Myspace ..etc) too frequently. It starts sending you warning alerts when you visit such sites too often.
10. SNESFUN
SNESFUN (www.snesfun.com) is a website let you play retro Super Nintendo / SNES / Super Famicom games online in your browser using flash emulator. You can play almost every single old Nintendo game.
11. Privnote - Send notes that will self-destruct after being read

Using email, chat or SMS will leave a record of the information sent on both devices -instead, you can use
PrivNote (privnote.com
). It lets you send a text note to anyone else using email, MS or chat and you can set the note to be deleted as soon as it gets read. You can even encrypt the note with a password.
12. Televisor

Discover great
TV to watch online with
Televisor (televisor.com
) . What are you in the mood to watch right now?
Televisor helps you find something to fill your cravings. Give
Televisor the thumbs up or down, and it will customize its recommendations.
13. Google Scholar

Get the most out of
Google Scholar (scholar.google.co.in) with some helpful tips on searches, email alerts, citation export, and more. Finding recent papers. Your search results are normally sorted by relevance, not by date.
14. Sci-Hub
Sci-
Hub (sci-hub.tw) is a website with over 64.5 million academic papers and articles available for direct download. It bypasses publisher paywalls by allowing access through educational institution proxies.
Sci-
Hubstores papers in its own repository, and additionally the papers downloaded by
Sci-
Hub are also stored in Library.
15. Giphy
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Do you like animated GIFs? You know, those images without sound that move for a few seconds and then start all over again? If you do, you'll love Giphy (giphy.com). Giphy is the Internet's search engine for GIFs. Even if you have nothing to search for, you can just look at what's trending on the front page or spend some time browsing through the categories.