Twitter is a privately funded startup with offices in the SoMA neighborhood of San Francisco, CA. Started as a side project in March of 2006, Twitter has grown into a real-time short messaging service that works over multiple net-works and devices.
In countries all around the world, people follow the sources most relevant to them and access information via Twitter as it happens—from breaking world news to updates from friends. See what people are doing right now.
Digg is a place for people to discover and share content from anywhere on the web. From the biggest online destinations to the most obscure blog, Digg surfaces the best stuff as voted on by our users. You won’t find editors at Digg — we’re here to provide a place where people can collectively determine the value of content and we’re changing the way people consume information online.
How do we do this? Everything on Digg — from news to videos to images — is submitted by our community (that would be you). Once something is submitted, other people see it and Digg what they like best. If your submission rocks and receives enough Diggs, it is promoted to the front page for the millions of our visitors to see.
And it doesn’t stop there. Because Digg is all about sharing and discovery, there’s a conversation that happens around the content. We’re here to promote that conversation and provide tools for our community to discuss the topics that they’re passionate about. By looking at information through the lens of the collective community on Digg, you’ll always find something interesting and unique. We’re committed to giving every piece of content on the web an equal shot at being the next big thing.
The best of the web – chosen by you.
- The buzz can be about anything — from breaking stories on major news to viral videos on personal blogs.
- Instead of editors, people like you submit the stories and “buzz up” the best ones.
How it works.
- First, we determine the most popular topics that people are searching for on Yahoo!.
- Then, we showcase the most popular stories within those topics, based on activities like voting, commenting, and emailing stories to friends.
- Stories with most Buzz may be published on the Yahoo! home page — you can impact what millions will see on Yahoo!.
About StumbleUpon
StumbleUpon helps you discover and share great websites. As you click 
Stumble!, we deliver high-quality pages matched to your personal preferences. These pages have been explicitly recommended by your friends or one of 8 million+ other websurfers with interests similar to you. Rating these sites you like (
) automatically shares them with like-minded people – and helps you discover great sites your friends recommend.
How Does it Work?
StumbleUpon uses 
/ 
ratings to form collaborative opinions on website quality. When you stumble, you will only see pages that friends and like-minded stumblers (
) have recommended. This helps you discover great content you probably wouldn’t find using a search engine.
Searching vs. Stumbling:
Using search engines to locate relevant content typically means hunting through pages of results. Rather than searching for quality web sites, StumbleUpon members are taken directly to web sites matching their personal interests and preferences.
What is reddit?
Reddit is a source for what’s new and popular on the web.
Users like you provide all of the content and decide, through voting, what’s good (
) and what’s junk (
).
Links that receive community approval bubble up towards #1, so the front page is constantly in motion and (hopefully) filled with fresh, interesting links.
What does the name “reddit” mean?
It’s (sort of) a play on words — i.e., “I read it on reddit.”
What is that alien / bug thing?
That adorable and informative creature is the mascot for the reddit community. You can visit redditalien.com for an archive of his past adventures.
Can anyone submit a link?
Yes — all you need is an account!
TweetMeme is a service which aggregates all the popular links on Twitter to determine which links are popular. TweetMeme categorises these links into Categories, Subcategories and Channels, making it easy to filter out the noise to find what you’re interested in.
We make it easy for you to subscribe to each category and the most popular through our RSS feeds and Twitter accounts. You can find out more about these through our help pages.
Discover
Using the TweetMeme Button you can discover new content and tweet about it. The button provides a fully integrated URL shortener and the title of the story or page. Each link which is posted on Twitter adds one to the tweet count for that story. Once the story has reached a critical mass of tweets, it makes it into the top 10 on the front page and gets tweeted by our Twitter account.
Share
Each story on TweetMeme has a TweetMeme Button which integrates both the current number of tweets that story has, and allows you to easily retweet the link.
Comment
You can leave comments on every story featured on TweetMeme, with the option of retweeting the best comments out to Twitter.
Search
Use the TweetMeme Search to search across stories posted on Twitter, and discover and share new content.
Promote
Install the TweetMeme Button quickly and easily on your website or blog, and let your users quickly and easily retweet your stories straight from your website
Technorati collects, organizes, and distributes the global online conversation.
Founded as the first blog search engine, Technorati has expanded to a full service media company:
- The largest social media advertising network
- The third largest blog media property*
- The 6th largest social media property*
- Online properties that introduce blog content to millions of consumers
