This is pretty long list but you will find useful websites here
http://www.screenr.com - record movies of your desktop and send them straight to YouTube.
http://www.ctrlq.org/screenshots - capture screenshots of web pages on mobile and desktops.
http://www.goo.gl - shorten long URLs and convert URLs into OR cod..
http://www.unfurlr.com - find the original URL that's hiding behind a short URL.
http://www.qClock.com - find the local time of a city using a Google Map.
http://www.copypastecharacter.com - copy special characters that aren't on your keyboard.
http://www.postpost.com - a better search engine for twitter.
http://www.lovelycharts.com - create flowcharts, network diagrams, sitemaps, etc.
http://www.iconfinder.com - the best place to find icons of all sizes.
http://www.office.com - download templates, clip-art and images for your Office documents.
http://www.followupthen.com - the easiest way to setup email reminders.
http://www.jotti.org - scan any suspicious file or email attachment for viruses.
http://www.wolframalpha.com - gets answers directly without searching.
http://www.printwhatyoulike.com - print web pages without the clutter.
http://www.joliprint.com - reformats news articles and bldg content as a newspaper. /closed since 1/4/2013
http://www.ctrql.org/rss - a search engine for RSS feeds.
http://www.e.ggtimer.com - a simple online timer for your daily needs.
http://www.coralcdn.org - if a site is down due to he, traffic, try accessing it through coral CON.
http://www.random.org - pick random numbers, flip wins, and more.
http://www.pdfescape.com - lets you can quickly edit PDFs in the browser itself.
http://www.viewer.zoho.com - Preview PDFs and Presentations directly in the browser.
http://www.tubemogul.com - simultaneously upload videos to YouTube and other video sites.
http://www.ctrlq.org/dictation - online voice recognition in the browser
http://www.scr.im - share you email address online without worrying about spam.
http://www.spypig.com - now get read receipts for your email.
http://www.sizeasy.com - visualize and compare the size of any Product
http://www.myfonts.com/WhatTheFont - quickly determine the font name from an image.
http://www.google.com/webfonts - a good collection of open source fonts.
http://www.regex.info - find data hidden in your photographs - see more RIF tools.
http://www.livestream.com - broadcast events live over the web, including your desktop screen.
http://www.iwantmyname.com - helps you search domains across all TLDs.
http://www.homestyler.com - design from scratch or re-model your home in 3d.
http://www.join.me - share you screen with anyone over the web.
http://www.onlineocr.net - recognize text from scanned PDFs - see other OCR tools.
http://www.flightstats.com - Track flight status at airports worldwide.
http://www.wetransfer.com - for sharing really big files online.
http://www.hundredzeros.com - the site lets you download free Kindle books.
http://www.polishmywriting.com - check your writing for spelling or grammatical errors.
http://www.marker.to - easily highlight the important parts of a web page for sharing.
http://www.typewith.me - work on the same document with multiple people.
http://www.whichdateworks.com - planning an event? find a date that works for all.
http://www.everytimezone.com - a less confusing view of the world time zones.
http://www.gtmetrix.com - the perfect tool for measuring your site performance online.
http://www.noteflight.com - print music sheets, write your own music online (review).
http://www.imo.im - chat with your buddies on Skype, Facebook, Google Tall, etc. from one place.
http://www.translee.google.com - translate web pages, PDFs and Office documents.
http://www.kleki.com - create paintings and sketches with a wide variety of brushes.
http://www.similarsites.com - discover new sites that are similar to what you like already.
http://www.wordle.net - quick summarize long pieces of text with tag clouds.
http://www.bubbl.us - create mind-maps, brainstorm ideas in the browser.
http://www.color.adobe.com - get colour ideas, also extract colours from photographs.
http://www.liveshare.com - share your photos in an album instantly. /no longer available
http://www.lmgtfy.com - when your friends are too lazy to use Google on their own.
http://www.midomi.com - when you need to find the name of a song.
http://www.bing.com/images - automatically find perfectly-sized wallpapers for mobiles.
http://www.faxzero.com - send an online fax for free - see more fax services.
http://www.feedmyinbox.com - get RSS feeds as an email newsletter.
http://www.ge.tt - quickly send a file to someone, they can even preview it before downloading.
http://www.plustransfer.com - transfer files of any size without uploading to a third-party server.
http://www.tinychat.com - setup a private chat room in micro-seconds.
http://www.privnote.com - create text notes that will self-destruct after being read.
http://www.boxoh.com - track the status of any shipment on Google Maps - alternative.
http://www.chipin.com - when you need to raise funds online for an event or a cause.
http://www.downforeveryoneorjustme.com - find if your favourite website is offline or not?
http://www.ewhois.com - find the other websites of a person with reverse Analytics lookup.
http://www.whoishostingthis.com - find the web host of any website.
http://www.google.com/history - found something on Google but can't remember it now?
http://www.aviary.com/myna - an online audio editor that lets record, and remix audio clips online.
http://www.disposablewebpage.com - create a temporary web page that self-destruct.
http://www.urbandictionary.com - find definitions of slang and informal words.
http://www.seatguru.com - consult this site before choosing a seat for your next flight
http://www.sxc.hu - download stock images absolutely free.
http://www.zoom.it - view very high-resolution images in your browser without scrolling.
http://www.scribblemaps.com - create custom Google Maps easily.
http://www.alertful.com - quickly setup email reminders for important events.
http://www.picmonkey.com - Picnik is offline but PicMonkey is an even better image editor.
http://www.formspring.me - you can ask or answer personal questions here.
http://www.sumopaint.com - an excellent layer-based online image editor.
http://www.snopes.com - find if that email offer you received is real or just another scam.
http://www.typingweb.com - master touch-typing with these practice sessions.
http://www.mailvu.com - send video emails to anyone using your web cam.
http://www.timerime.com - create timelines with audio, video and images.
http://www.stupeflix.com - make a movie out of your images, audio and video clips.
http://www.safeweb.norton.com - check the trust level of any website.
http://www.teuxdeux.com - a beautiful to-do app that looks like your paper dairy.
http://www.deadurl.com - you'll need this when your bookmarked web pages are deleted.
http://www.minutes.io - quickly capture effective notes during meetings.
http://www.youtube.com/leanback - Watch YouTube channels in TV mode.
http://www.youtube.com/disco - quickly create a video playlist of your favourite artist. /?
http://www.talltweets.com - Send tweets longer than 140 characters.
http://www.pancake.io - create a free and simple website using your Dropbox account.
http://www.builtwith.com - find the technology stack of any website.
http://www.woorank.com - research a website from the SEC perspective.
http://www.mixlr.com - broadcast live audio over the web.
http://www.radbox.me - bookmark online videos and watch them later (review).
http://www.tagmydoc.com - add OR codes to your documents and presentations (review).
http://www.notes.io - the easiest way to mite short text notes in the browser.
http://www.ctrlq.org/html-mail - send rich-text mails to anyone, anonymously.
http://www.fiverr.com - hire people to do little things for $5.
http://www.otixo.com - easily manage your online files on Dropbox, Google Docs, etc.
http://www.ifttt.com - create a connection between all your online accounts.