1. LinkedIn LinkedIn, The grandaddy of business social networks. LinkedIn strengthens and extends your existing network of trusted contacts 2. Meet The Boss Meet the Boss is a business networking tool for business executives around the world, across all vertical industries. Content is all in English. 3. PartnerUp PartnerUp is an online networking community that entrepreneurs and small business owners use to find the expertise and resources they need to start and grow a business. Members can connect with potential partners, advisers, and business resources. 4. Qapacity Qapacity is a business-oriented social networking site and a business directory founded in March 2008 and launched in February 2009. User are given a set of tools to promote their business online, to keep their clients and business partners up-to-date with their work and to reach new clients. 5. Ryze Ryze.com is a free social networking website designed to link business professionals, particularly new entrepreneurs. 6. Talkbiznow Talkbiznowis a comprehensive interactive business networking site for business professionals. 7. XING XING is a social software platform for enabling a small-world network for professionals. 8. Yelp, Inc. Yelp is a local business review and talk networking site, including user reviews and recommendations. 9. FledgeWing FledgeWing is an online community aimed at entrepreneurial university students launched in February 2009. 10. The Funded TheFunded allows entrepreneurs to research, rate, and review venture capital sources worldwide
Tumblr? You can't really be friends with people or mention them, but you can like and reblog and follow. You can also message, kind of.
Too many to list. Here are a few: MySpace.com Hi5.com Friendster.com Meetup.com StumbleUpon.com Digg.com
Facebook, Twitter, Linkedin, Myspace, Orkut, hi5, Digg, Delicious, Stumble Upon, Google Plus. But the best once are stumble upon and linkedin after facebook and twitter.
There are a lot other than Twitter and Facebook, some are: - Myspace - Google Plus - Google Buzz - Bebo - Friend Feed - Orkut - Stumbleupon
Their are many like Digg,Reddit,Stumbleupon,Folkd,etc...These all sites are high PR sites and if you want to know more websites search in Google.
Thanks every one for your valuable comments, Those who are interested in group bike trip please Check out the itinerary of Leh Ladakh bike trip : http://wilsontom.blogspot.com/2011/11/itinerary.html