The website del.icio.us (pronounced as "delicious") is a social bookmarking, social software web service for storing and sharing web bookmarks. The site came online in late 2003 and was developed by Joshua Schachter, co-maintainer of Memepool.

Everything posted to del.icio.us is publicly viewable by default, although a user can mark specific bookmarks as private, and mass-imported bookmarks are private by default. The public aspect is emphasized; it is not intended to be a tool for storing private bookmark collections. Many people use their del.icio.us RSS feed to publish "linkblogs" on their weblogs.

A non-hierarchical keyword categorization system is used on del.icio.us where users can tag each of their bookmarks with a number of freely chosen keywords (cf. folksonomy). A combined view of everyone's bookmarks with a given tag is available; for instance, the URL "http://del.icio.us/tag/wiki" displays all of the most recent links tagged "wiki". Its collective nature also makes it possible to view bookmarks added by similar-minded users.

del.icio.us has a front page "hotlist", "popular" and "recent" pages that help to make the website an effective conveyor of popular internet memes and trends.

The website's unconventional domain name, known as a domain hack, its simple HTML interface with human readable URLs, as well as a REST API and RSS feeds for web syndication, have contributed to making it one of the most popular services of its kind.

Use of del.icio.us is currently free. The source code of the site is not available, but a user's own entered data is freely downloadable through the API.

There exist a few open source clones of del.icio.us such as de.lirio.us and sa.bros.us, as well as many competing Social bookmarking services such as BlinkList, Furl and Spurl.

del.icio.us was acquired by Yahoo! on Friday, December 9 2005. Various guesses suggest it was sold for somewhere between $15-30 million US dollars . This would be Yahoo's second purchase of an internet company using a domain hack, [http://blo.gs/ blo.gs being their first.

Sample queries

View recent entries:

• http://del.icio.us/recent

View today's popular entries:

• http://del.icio.us/popular

View popular tags:

• http://del.icio.us/tag

Find any url that is tagged with "Nanotechnology":

• http://del.icio.us/tag/Nanotechnology

Combine tags. Find any url that is tagged with both "Nanotechnology" and "Fabrication":

• http://del.icio.us/tag/Nanotechnology+Fabrication

Find entries with a certain media type:

• http://del.icio.us/tag/system:media:video

Find the history of how a url has been tagged:

• http://del.icio.us/url?url=http://wikipedia.org

See also

• Social bookmarking
• Folksonomy - The method of organization that del.icio.us uses
• Joshua Schachter - Developer of del.icio.us
• Yahoo! - Acquirer of del.icio.us

External links

Official sites

• del.icio.us
• del.icio.us blog
• del.icio.us help

Alternate interfaces

• skin.del.icio.us - A del.icio.us skin for Firefox
• Simplifying del.icio.us - A modified del.icio.us posting interface for Firefox
• del.icio.us direc.tor - Delivering a High-Performance AJAX Web Service Broker
• Expialidocio.us - Posting histograms and time-specific tag clouds using OpenLaszlo and the del.icio.us API
• Revealicious - A set of graphic visualisations for your del.icio.us account
• Delicious Soup - A tool that reveals your del.icio.us activities
• browse.delicious - A visual browser to explore and experience the del.icio.us community network
• thumblicio.us - Browse del.icio.us using thumbnails
• del.icio.us most popular treemap
• populicio.us - del.icio.us popular sites
• LiveMarks - Popular del.icio.us bookmarks dynamically loaded real-time
• trendalicious - A near real-time view of website popularity trends in del.icio.us
• Facetious - Search at the crossing of several tags
• similicio.us - Search del.icio.us posts for similar sites

Mashups

• digglicious.com - A blend of Digg & del.icio.us
• diggdot.us - Digg + Slashdot + del.icio.us
• Daily Mashup - The days popular photos, links, and news
• popurls.com - Featuring feeds from various folksonomy sites

Browser integration

• del.icio.us toolbar for Firefox
• Foxylicious - A Firefox extension that syncs your del.icio.us bookmarks into your browser bookmarks
• Internet Explorer Active Channel - Automatically import your tags to Internet Explorer's favorites
• delicious2safari - Import your del.icio.us bookmarks into Safari
• Safarilicious - Export your Safari Bookmarks To del.icio.us

del.icio.us clients

• Deliwin - A del.icio.us bookmark manager for Windows
• Delibar - Store all your bookmarks in the Mac OS X system bar so you can easily access them by selecting the tag and link.
• Cocoalicious - A Cocoa del.icio.us Client for Mac OS X
• Pukka - A lightweight Cocoa del.icio.us Client for Mac OS X
• Delicer - A del.icio.us Client for Windows (Delicer on CNET download.com)

Community websites | Domain hacks | Social bookmarking | Yahoo! | Web 2.0

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