Web 2.0 Social Media Websites

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Following is a list of the most popular social media web 2.0 sites; in no particular order and by no means complete. The number represents approximate Alexa rating; the lower the number, the more visitors the site has. New category: Social Action Sites

Tagging, Bookmarking, News Sites:

Digg - Popular tagging site; incl. videos, images, podcasts. 130

Reddit - Submit links; share; vote; comment. 3,800

Startaid - Save your bookmarks online; view others' bookmarks and categories; rate bookmarks. 3,000

Metafilter - Another popular tagging site; edited and moderated. 4,800

Mixx - Submit links; share; vote; comment. 5,300

Dzone - Submit links; share; vote; comment. For web developers. 7,500

Shoutwire - Submit links; share; vote; comment. 15,000

I Am Bored - Submit cool, interesting, or funny links; submissions will be reviewed. 5,000

Yigg - German language. 7,300

Mister-Wong - German language. 2,200

Propeller - Social news tagging site - all topics; comment on news; edited. 1,800

Fark: News aggregator site; users comment on articles; submit links to news articles. 2,800

Newsvine - Community news site - all topics; discuss news articles or other users' articles; submit your own articles. 6,700

Linkinn - Share photos and videos of offbeat and weird content. 9,000

Earthfrisk - Share news, links, photos, network. 77,000

Nowpublic - Create your own news stories from your neighborhood and get paid. 12,000

Searchles - Share your favorite links and videos. 26,000

Plime - Submit links; comment; share; edited. 32,000

Truemors - Breaking news or rumors. 80,000

Social Media Niche Sites:

GoodReads - Discuss books; post your reading list; see what your friends are reading. 11000

FanFiction - Unleash your imagination and write! 310

Hugg - Treehugger.com's social news site, focused on "green" news. 76000

StumbleUpon - Recommend and discover new websites. 350

CafeMom - Very popular mom site. 4700

Socializr - Event sharing. 90000

Design Float - Submit links; share; vote; comment. For web designers. 31000

MeetUp - Find others who share similar interests nearby. 950

Bebo - Explore great entertainment. 108

Slashdot - News for nerds; also submit your own stories. 1300

Sphinn - Internet marketing news and discussion. 3300

Autospies - For car enthusiasts; submit stories and vote on them. 21000

ClearStation - For investors. 13000

Kirtsy - Submit links; vote and comment; edited; for women. 105000

Chowhound - For those who love to eat: recipes, stories, boards, places. 6300

Teenwag - For teens; submit site, videos, photos, games; focus on celebrities. 55000

Buzzflash - "A progressive political news website that allows you to submit political stories." 27000

Sphinn - Internet marketing - share news, forum. 26000

Ball Hype - Aggregator site for sports enthusiasts. Videos, photos, news, blogs. 11000

Corkd - For wine enthusiasts. 81000

Showhype - Entertainment celebrity news. 12000

Buzznet - Music, celebrities, movies, pop culture, entertainment. 525

YCombinator Hacker News - Startups, business and technology. 78000

Small Business Brief - Tag and share small business news. 73000

IndianPad - India and Indian related news. 6500

Muti - African interest or Africa related news. 97000

SWiK - "...a community driven resource for people who use open source software." 15000

C2NN - The news part of this "green" and human rights site lets users submit links to stories; comments; vote. 5000

ILikeTotallyLoveIt.com - Shop for exceptional items that others recommend. 88000

Virb - Share music and videos. 13000

DeviantArt - Share your art and photos. 77

Flickr - Share your photos. 38

YouTube - Share your videos. 3

Yelp - Reviews by city. 800

DotNetKicks - Open source site for web developers. 91000

Imeem - Share your favorite artists' music, photos and videos. 140

Lipstick - Celebrity news. 24000

Aggregator Sites:

FriendFeed - Find out what your friends are posting on social media sites. 45000

LifeStream - A media and social aggregator that will keep you and your friends informed about what you're doing online at a glance and in realtime. 58000

Micro blogging, Mobil, IM:

Twitter - "What are you doing?" 1300

Jaiku - "Your Conversation" 36000

Social Action Sites:

Note: If you're planning to sign up your own non-profit on any of the sites that collect donations for your group, be sure to shop around! Fees range from 0% to over 10%. A reasonable fee would be up to around 3 to 4% of your donations to keep your organizations's page up and be able to collect credit card donations.

SocialVibe - Choose a cause and a sponsor, then add your customized badge to your social networking profiles to earn money for that cause. 35,000

Care2PetitionSite - Help make powerful, positive changes in our world. 16,000

Change - Connect with likeminded people. Donate or take action and volunteer for projects around the world. 90,000

ChangingThePresent - Give a charity gift, by donating to a non-profit. 40,000

SocialActions - "Connects individuals with opportunities to take action in an effort to increase the scope and impact of the citizen sector." 236,000

DonorsChoose - Teachers ask for classroom project materials; donors pick a project and help out. 100,000

GlobalGiving - Connects donors with community-based projects that need support - worlwide. 118,000

Idealist - "People and organizations can exchange resources and ideas, locate opportunities and supporters..." 10,000

Kiva - Micro-lending website: lend directly to unique entrepreneurs in the developing world in order to alleviate poverty.28,000

ThePoint - Get people to pledge to give money or do something collectively. 150,000

VolunteerMatch - Matches volunteers to causes. 30,000

Amazee - Share your goals connect with like-minded people. 150,000

CharityFocus - Non-profit that hooks up volunteers with a cause. 280,000