Chrome google.com/chrome newly out of beta, though Windows-only.
Firefox mozilla.com/firefox infinitely malleable, with fewer security holes.
Flock flock.com with an emphasis on linking to social networks.
Opera opera.com growing in importance for mobiles.
Safari apple.com/safari Apple's contender; a leader in mobile web access.
Everyone needs some relaxation.
Dilbert dilbert.com hi, cube-dwellers.
Alex alexcartoon.com amid the financial crisis, Alex the banker remains reliably self-interested.
Doonesbury doonesbury.com the cartoon you'll also find in that printed newspaper thing.
The Joy of Tech geekculture.com/joyoftech well-drawn, witty near-daily takes on Apple and computing life.
XKCD xkcd.com "Stick-figure strip featuring humour about technology, science, mathematics and relationships."
Dipity dipity.com build timelines and add text, pictures and videos.
Zoho zoho.com everything in one place, from documents to presentations.
Rememberthemilk rememberthemilk.com online task/to-do management.
Netvibes netvibes.com your to-do lists, news, weather and photos on one page.
280slides 280slides.com create presentations online. Very slick.
Zamzar zamzar.com convert files from one format to another.
Eurogamer eurogamer.net reportage, with breadth, if not always depth.
The Independent GamingSource tigsource.com a great place to pick up on tomorrow's breakthrough hits.
Pocket Gamer pocketgamer.co.uk still by far the best site on handheld gaming.
Metacritic metacritic.com/games industry touchstone and useful one-stop buying guide.
Jay is Games jayisgames.com passionate, well-designed and knowledgeable.
Stack Overflow stackoverflow.com where programmers gather.
The Daily WTF thedailywtf.com daily despatches from the coding warzone.
Joel On Software joelonsoftware.com essays by a former Microsoftie.Streetwire streetwire.org hyperlocal information including planning alerts, crime and public safety, traffic, local news and postings to FixMyStreet.com.
Recycle Now recyclenow.com winner of the Show Us A Better Way competition.
Dopplr dopplr.com "share your future travel plans with friends and colleagues", then find out if others will be there too.
Qype qype.com localised search for pubs, restaurants, etc; also a bit of a social network.
Loopt loopt.com "transforms your mobile phone into a social compass".
Brightkite brightkite.com a "location-based social network".
OpenStreetMap openstreetmap.org a rights-free map created by people like you. Remarkably detailed and precise.
Walkit walkit.com walking directions for all sorts of routes.
Google Maps Street View maps.google.com/help/maps/streetview soon to have the UK as well.
Noise pollution map noisemapping.defra.gov.uk how noisy is it in the area around your house?
Where's The Path? wheresthepath.googlepages.com/wheresthepath.htm Let down by OS's absurd OpenSpace restrictions.
Money Saving Expert moneysavingexpert.com does what it says on the tin.
BView bview.co.uk review businesses before you use them.
Say No to 0870 saynoto0870.com direct-dial numbers, not expensive national-rate ones.
Consumer Direct consumerdirect.gov.uk government site for consumers.
Zopa zopa.com a human-centred way to loan money to people in the developing world.
Last.fm last.fm British-made, CBS-owned, music recommendation station.
Amazon amazon.co.uk now has its own MP3 store in the UK as well as the US.
7Digital 7digital.com music downloads in MP3 format - so not tied to iPods.
Passionato passionato.com classical music MP3 downloads, slowly building momentum.
Songkick songkick.com find out where your favourite bands are playing next, based on your music library.
Blip.fm blip.fm be your own DJ and create a social network from your choices and recommendations.
Digg digg.com still the reigning champion.
Reddit reddit.com slightly upmarket from Digg; slightly below...
Techmeme techmeme.com technology news chosen by computer, though it's now adding human editors.
Popurls popurls.com aggregating the aggregators: the web in a window.
Slashdot slashdot.org still attracts a big, and often knowledgable, audience.he Onion theonion.com still the satirical newspaper of record.
B3TA b3ta.com beyond classification; its forum has spawned many memes... and trolls.
Lolcats icanhazcheezburger.com captioned cats and other animals.
PostSecret postsecret.blogspot.com notes of secrets sent by people who want them posted. So they are.
Passive-Aggressive Notes passiveaggressivenotes.com would it be too much trouble for you to have a look?
Flickr flickr.com the granddaddy of photo-sharing sites.
Picnik picnik.com photo editing in your browser.
Picasa picasa.com Google's photo organisation and editing tool. Windows only.
Moo moo.com Moo business cards have become a calling card in themselves.
Blurb blurb.com coffee-table book publishing of your books.
Lulu lulu.com book, photobook, calendars and other sorts of publishing.
Cafepress cafepress.com badges, T-shirts etc. US-only at present.
Spreadshirt spreadshirt.net design your own T-shirt or sweatshirt and get it printed.
CIA Factbook cia.gov/library/publications/the-world-factbook all the data you need on pretty much anywhere.
Wikipedia wikipedia.com still a first port of call on most topics.
Rotten Tomatoes rottentomatoes.com check the film you plan to see here.
Internet Archive/Wayback Machine archive.org the web in aspic.
Wikileaks wikileaks.org anonymous source of leaked documents.
Clusty clusty.com results in clouds.
CoolIris cooliris.com image-based searching - a new way to use the web.
Facebook facebook.com virtually everyone's your friend here.
Myspace myspace.com hangout for all the teenagers. And Kirk Douglas.
LinkedIn linkedin.com mainly for business.
Friends Reunited friendsreunited.co.uk the original social network.
Twitter twitter.com the ur-site, where you can create an identity (or several).
Monitter monitter.com watch keywords on Twitter. A brand, your name, a meme? No login required at present.
Matt themattinator.com post to multiple Twitter accounts. Requires your password; only give if you trust the site.
Twitterfeed twitterfeed.com posts blog contents to Twitter. Requires password; only give if you're sure that you trust the site. We do.
Twitter Grader twitter.grader.com find how you rank on Twitter.
BBC iPlayer bbc.co.uk/iplayer already taking up 10% of UK network traffic.
YouTube youtube.com dominant provider of video content online.
Vimeo vimeo.com better rights control than YouTube and a cleaner interface.
Worldtv.com worldtv.com set up your own global TV channel.
Qik qik.com video-sharing from your mobile.
Joost joost.com internet TV via a browser plugin.
Videojug videojug.com a sort of social network of informational video.
Seesmic seesmic.com short video conversation: another social network.
Runescape runescape.com amazingly successful MMORPG.
Entropia Universe entropiauniverse.com set in a distant future on the untamed planet of Calypso.
Club Penguin clubpenguin.com minigame-tastic virtual world for kids.
Moshi Monsters moshimonsters.com "educational" virtual world for kids.
DabbleDB dabbledb.com create online databases and analyse them.
Google Visualisation tools code.google.com/apis/visualization/documentation/gallery.html dozens of tools for making data more comprehensible.
Many Eyes manyeyes.alphaworks.ibm.com/manyeyes/page/Visualization_Options.html IBM's visualisation tools, similar to Google's.