Meetup — helps people get together with a group of neighbors who share a common interest (46,315 groups and 4.7 million are part of Meetup). The site helps users self-organize global, monthly “Meetup Days” — local group gatherings on the same day everywhere — for almost any interest group. Meetups take place in up to 3,600+ cities at local cafes, restaurants, bookstores, and other local establishments.
MyWorkster.com — specializes in building exclusive, professional College networks. Through these networks, members get connected to exclusive career opportunities. These networks allow members to brand themselves through professional and social content in an effort to advance their career and the careers of those around them. No cost to job-seekers.
NetParty — According to Forbes, which lists it as a Forbes Best of the Web site, Netparty functions as the entry point for a network of parties held in 17 U.S. cities, aimed at professionals in their 20s and 30s. The events, held at stylish clubs, are designed to combine business networking with social fun.
Networking for Professionals — an online networking group designed for professionals from numerous occupations, where you can build your business, improve your client base, and/or advance your career. Privacy is controlled by the user. First month of membership is free; each month thereafter is fee-based.
PowerMingle.com — Based in London, Powermingle Ltd, provides services for effective, interpersonal, business networking at events and in organizations and associations.
Real Contacts — a worldwide online employment service for permanent or temporary jobs that brings employers and job-seekers together through their extended network of contacts.
Ryze — members get a free networking-oriented home page and can send messages to other members. They can also join special networks related to their industry, interests or location. More than 200 organizations host Networks on Ryze to help their members interact with each other and grow their organizations. Ryze has more than 500,000 members in more than 200 countries. Listed as a Forbes Best of the Web site.