Bloglines is a FREE online service for searching, subscribing, creating and sharing news feeds, blogs and rich web content. With Bloglines, there is no software to download or install -- simply register as a new user and you can instantly begin accessing your account any time, from any computer or mobile device. And it's FREE! Bloglines is a window to a whole new world of dynamic content that is being created and distributed over the new "live" web. You can make your own personalized news page tailored to your unique interests from our index of tens of millions of live internet content feeds, including articles, blogs, images and audio. And it's FREE! - 
Bloglines

Digg is a user driven social content website. Ok, so what the heck does that mean? Well, everything on Digg is submitted by our community (that would be you). After you submit content, other people read your submission and Digg what they like best. If your story rocks and receives enough Diggs, it is promoted to the front page for the millions of visitors to see. What can you do as a Digg user? Lots. Every person can digg (help promote), bury (help remove spam), and comment on stories... you can even Digg and bury comments you like or dislike. Digg also allows you to track your friends' activity throughout the site — want to share a video or news story with a friend? Digg it! - 
Digg

Facebook is a social utility that helps people better understand the world around them. Facebook develops technologies that facilitate the spread of information through social networks allowing people to share information online the same way they do in the real world. Facebook is made up of many networks - individual schools, companies or regions - each of which are independent and closed off to non-affiliated users. To join Facebook, people can authenticate into a school or work network, or they can join a regional network. They can then create profiles to connect with friends, share interests, join groups, send messages, write notes and post photos. - 
Facebook

Basically a "check-in" service for those who want to know where their friends are. By using their application, users can "check-in" to inform their friends where they are and every "check-in" will be awarded with some sort of points. So the more places you "check-in", the more points you get. And you will become "mayor" if you check in more times than anymore else. Yes, I have no idea why are there people so interested in knowing where their friends have been, nor I see to need to tell everyone where I have been or where I frequent. I mean I frequent the men's toilet very often, do I need to "check-in"? And if I check in too often, will I be crowned the "mayor" of the men's toilet? And if I do, what do I get? A pat on the back from my colleagues and then a pink slip from my boss? Anyway, this is some sort of social-networking fad and it requires your mobile device to be internet enabled in order to get the location.

ONEsite is the market leader in providing private labeled social networks. Whether you are a big global brand with a community made up of millions or a local organization serving several thousand, ONEsite has a solution for you. With a variety of options for those large and small, ONEsite’s Social Networking Solutions can fit your need. Please visit some of our “customers social networks” to see for yourself. We use a combination of proprietary patent pending technologies that combines professional web hosting with social networking. Central to the ONEsite offering and value proposition: - 
ONEsite

Simpy is a social bookmarking service that lets you save, tag and search your own bookmarks and notes or browse and search other users' links and tags. You can be open and share your links with others, or keep them private. Simpy also helps you find like-minded people, discover new and interesting sites, publish your bookmarks, detect and eliminate link-rot, etc. - 
Simpy

Multiply gives you an easy way to share all kinds of digital media, including photos, blogs, videos, music and more, all in one convenient place: your own personal web site. With Multiply, you can share and discuss your stuff with everyone in your "social network," and also be alerted whenever they have something new. - 
Multiply

Channel surf the internet with StumbleUpon! Discover great websites, videos, pictures and more — all according to your interests. Get personalized recommendations according to your interests - 
Stumble Upon

Saving references in Conntoea is quick and easy. You do it by saving a link to a web page for the reference, whether that be the PubMed entry, the publisher's PDF, or even an Amazon product page for a book. Connotea will, wherever possible, recognise the reference and automatically add in the bibliographic information for you. In Connotea you assign keywords (or 'tags') to your references. These can be anything you like, and you can use as many as you like, so there's no more need to navigate complicated hierarchies of folders and categories. Connotea shows you all the tags you've ever used, so it's easy to get back to a reference once you've saved it. - 
Connotea

Finding by tags makes organizing bookmarks a thing of the past. Since it’s a website, your Ma.gnolia bookmark collection can be reached by you and your friends from anywhere, any time. And don’t worry about web pages disappearing from your searches or even the web, as we make a saved copy of each page you bookmark where websites allow us to. If searching was the first day of the web, people helping each other find what they want must be the second. Give Ma.gnolia a try to see what we mean when we say Found is the New Search. - 
Ma.gnolia

Furl is a free service that saves the important items you find on the Web and enables you to quickly find them again. Furl archives a personal copy of every page you save. When you want to recall it, you can find it instantly by searching the full text your archived items. Each member has a personal archive of 5 gigabytes (GB), large enough to store tens of thousands of searchable items. Furl recommends new Web pages that may interest you, guided by the sites you've already "Furled," or saved. Furl also offers the best ways to share the content you find on the Web. Send a daily email newsletter of links to friends and colleagues, use Furl to generate RSS feeds for your links, or integrate them quickly and easily into an existing Web site. - 
Furl

Our mission is to help you be more effective in your daily work and open doors to opportunities using the professional relationships you already have. LinkedIn is an online network of more than 9 million experienced professionals from around the world, representing 130 industries. When you join, you create a profile that summarizes your professional accomplishments. Your profile helps you find and be found by former colleagues, clients, and partners. You can add more connections by inviting trusted contacts to join LinkedIn and connect to you. - 
LinkedIn

Ning is a free online service for cloning, customizing and sharing Social Websites. Check out what we mean by Social Web Apps by taking a spin here. Since we are a new service, we thought we'd tell you more about us and why we're passionate about making Ning the easiest place on earth to create your own Social Web Apps. - 
Ning

WeSRCH is a social networking site for technical professionals and their colleagues in the semiconductor manufacturing, equipment, and process technology fields. WeSRCH is unique: it provides an open forum for sharing technical ideas, company news, and personal opinions. Simply stated, WeSRCH is about forming communities of researchers, enabling open conversations among like-minded professionals. - 
WeSRCH.com

I am not too sure what to make of this social networking site. It claims to be a place for people to connect to each other by asking them to answer some very original questions. And from there you can read how others respond, some of which is pretty humorous and original. They claim that you can find out a lot about someone from thesr responses. Well, true to a point. Intelligent and witty responses str nice to read and does give some imdication about oneself. And furthermore, users can link to their facebook, twitter and blogger accounts. I doubt it will get big but the idea works just fine.

This is a social networking site with a slight twist. Instead of just being able to "bookmark" and share websites, Diigo allows users to search tagged sites and even leave "sticky notes" on the site. Certainly more useful than just bookmarking if you ask me. I think social networking sites are useful but it can only be used as an advertising platform and nothing more. But if you have the ability to search information on tagged sites, it would be so much more. Have you ever found a website which contains so very important information, only to find out that you can't remember which part of the site you found the information. Diigo features allow you to search and find the information easily through all your tagged sites. It is like a website manager of your important information. Premium account holders can even search cached copies (cached as in cached in Diigo's database), so you will never lose information again. They have apps for iPad, iPhone and even Android. Pretty nifty if you ask me.

Don't you wish you were the first to discover something interesting before it becomes viral on the Internet? well, not to worry, now youcan do it easily with BuzzFeed. This is some sort of a platform which can help find Internet content which might go viral. It even comes with a electoral system whereby users can vote whether something will become viral or not. Usually that "something" is a link, video or image. I guess it is the fun factor that most people enjoy. Users can also post content on the site and see what others think of it. Imagine it as those social bookmarking sites but with an emphasis on content which haven't viewed by many people yet. Users will be rewarded with points if they are able to spot such viral content before it happen. They can even "badge" those contents like "cute", WTF" and "LOL". It is just like labels, but only much cooler. And yes, everything is done real-time so you will get the most up-to-date "about to become" viral content right in front of your eyes before everybody.

Finally after so long, we actually have a social networking site just for teenagers. Not! But it is true, this site is mainly focused on social networking for teenagers. It is basically the same as Facebook but with more things just for teenagers. You can create a profile page, send gifts to each other, chat wit your friend and play games. You can even make "lunch money" on the site. And if you make enough lunch money, you can even donate to charity if you wish to. And since it is teenager focused with a huge emphassis on fun, it is huge! Kids love the Internet. And Facebook scares them too much. They have over 15 million visits per week and mostly from the United States. In other countries, probably less popular. I don't know why. The thing I honestly don't understand is how they make money. Yes, from advertisements I know. But how much advertisement can be earned from such sites? Most people tend to ignore online advertisements and some even shut them off completely when surfing the Internet. Is that real money there?

Surprisingly, this site is not comletely about meeting each other online but rather offline meetups. It acts as an intermediary to faciliate meet ups for groups of people living apart. So you can search and find a group with the same interests as you and join them for coffee or some event. So if you like basketball, just key in basketball and your zip code and you will find various groups with the same interest living nearly. You can then of course join them in whatever event they are doing - to share ideas, change something or even to learn new stuff. You can even find groups in the same location and simply meet for the fun of it. Great way to meet new people if you ask me. They took a simple idea and make it feasible. Of course it is always important to take some precautions when meeing strangers on the Internet. And always meet in a public place, unless you are familiar and comfortable with the rest of the group.

They are the self proclaimed largest community of people who are into healthy and green living and they care alot about human rights and animal welfare. That is great. Think of it as a social networking site for hippies. But I like the idea. At least, it is not one of the same old social networking site where you login to play games, complain about your boss or your teachers and post some nude picture of yourself. It is indeed something different. This site actual empowers you! I know that green living is not in everyone's agenda right now but healthy living, now that I can understand. Human rights I can understand as well. Animal welfare - well to a certain extent. In my humble opinion, we don't treat our own kind well enough to really care about animal welfare. Yes, it is great that people are taking animal welfare a little more seriously but I just think it is hypocritical when you see so much suffering around the world.