10 minute mail - For those times you need a throwaway email address (like getting two more free weeks of Hulu Plus). The email address will enable you to get confirmation then self destruct in 10 minutes.

wolframalpha.com – gets answers directly without searching - see more wolfram tips.

printwhatyoulike.com – print web pages without the clutter.

faxzero.com – send an online fax for free – see more fax services.

Zero Dollar Movies - If you are on a constant lookout of free full length movies, then Zero Dollar movies provides a collection of over 15,000 movies in multiple languages that are available to watch for free on Youtube. It indexes only full length movies and no trailers, or partial uploads. In addition, it has a clean interface, contributing to a good movie watching experience.

Printfriendly.com - Printing a webpage from a browser can get quite messy with multiple links, ads, images and other page fillers. Printfriendly.com will give you a modifiable, printable page in a few seconds. You just need to paste the url in the website.

Mailinator.com - This is probably the most helpful one in the list as almost every website you visit asks you to sign-up using an email address. Mailinator is a free service that gives you an email address that automatically gets destroyed after a few hours. You can use this email id to activate your account on any website and you don't have to worry about getting spammed ever in your life.

alternativeTo: One of the most useful websites on our list, alternativeTo comes in handy when you wish to find out alternatives to the software and apps that you already know of

BugMeNot. - How many times have you skipped accessing a website because you didn’t want to provide your personal information? BugMeNot shares logins, so you can get what you need without exposing yourself to endless spam.

myfonts.com/WhatTheFont – quickly determine the font name from an image.

google.com/webfonts – a good collection of open source fonts.

regex.info – find data hidden in your photographs – see more EXIF tools.

google.com/history – see your past searches, also among most important Google URLs

bing.com/images – automatically find perfectly-sized wallpapers for mobiles.

pipebytes.com – transfer files of any size without uploading to a third-party server.
labnol.org – software tutorials and how-to guides.

unsplash.com – download images absolutely free.

sumopaint.com – an excellent layer-based online image editor.

stupeflix.com – make a movie out of your images, audio and video clips.

Picnik.com - An easy to use online image editing site. It offers several tools allowing you to add shapes, fonts, and special effects to your photos.

SuperCook.com - Enter an ingredient currently in the kitchen - and this website will show recipes that use this ingredient. It also shows what else is need to complete the recipe.

AllRecipes.com - The most popular recipe website on the web with over 40,000 recipes many of which have been tested and reviewed by multiple food critics.

eNature.com - Guides for more than 5,500 species make this one of the best Wildlife resources in the world.

Space.com - Learn everything you need to know about Space including the latest news and information. There is also a wealth of information about NASA, Astronomy, Stars, and the Planets.

EasyUnitConverter.com * - Easy to use resource for converting shoe sizes, currencies, cooking units, distance and length, volume units, and more.

clicker.com - This website aims to be the TV guide for Internet TV. With a wide variety of places to watch television online, this website can help users ensure that they catch their favorite show. You can sort by genre, live, Web originals, movies, music, and more.

Library of Congress - Most of our national library’s texts are now available online. Whatever skill it is you want to learn, you can read up on it there.

Boundless - Remember taking on a second part-time job just to pay for your college textbooks? Boundless is shaking up the textbook industry by offering textbooks online, for free.

Lifehacker - One of my favorite sites on the planet, Lifehacker is the place to learn how to do just about anything better, faster, and smarter.

PBS Video- Watch well-researched, in-depth documentaries from PBS, free of charge online.

shouldiremoveit.com – Find out which applications you should remove from your computer.

oldversion.com – Get old versions of software.

pipl.com – A search engine for finding people.
ptable.com – An interactive periodic table.

thistothat.com – Find out the best way to glue this to that.

rhymer.com – Online rhyming dictionary.

fake name generator - For when you need a whole new identity.

Rasterbator - Make a printable poster out of any image.

Gifprint - Turn an animated gif into a printable flip book.

Login2.me – Free login id and password for every website

100,000 Stars - This is one of the most beautiful things I have ever seen on the web. It shows a representation of galaxy with stars inside it. You can take a tour which starts from the Sun and takes you to the outer edges of the galaxy while teaching you valuable insights in between.

The Chive - The Chive is a photo and video blog of the wacky, insane, and the curious. From pretty girls to absurd photobombs to thought-inspiring landscapes, The Chive delivers on addictive appeal. While much of the content caters to post-adolescents and college-aged youths (i.e. expect many photos of undergrads having fun), there is a definite broader appeal for anyone who likes curious news. Come see why many people claim that The Chive is 'the best site in the world'.

sxc.hu – Need stock images? You can download these for free.

Console Living Room – Created by the Internet Archives, you can play 900 classic arcade games in your browser.

Eyes In Space – Fly up to the space while you can look around.

Every Stock Photo - They have something like 30,000,000 photos available

Drench - A very simple browser game, Drench gives you a board with different colored tiles, and you use the buttons to flip the colors around. Do this until your board is full of tiles of a single color only. It’s a bit more difficult to explain, but once you get the hang of it, it can be really addicting and for some, relaxing.