GoToMeeting (by Citrix Online) is a simple online conferencing application that allows you to quickly setup web meetings. With GoToMeeting you can share online presentations, product demonstrations, and collaborate with people around the world.
With GoToMeeting you can host online meetings with up to 15 participants. If you want to host a meeting with more than 15 participants you will need to upgrade to GoToMeeting corporate, which can host up to 1,000 people.
WebEx (a Cisco company) is arguably the most recognizable name in the web conferencing industry. They have online meeting solutions for small business and Fortune 500 companies.
WebEx's small business product, MeetMeNow, is ideal for online meetings, desktop sharing, product demonstrations, and real time collaboration.
Microsoft has been in the online meeting game for more than 10 years. One of their first products, NetMeeting, was bundled free with older versions of their operating system. Microsoft's next generation of web collaboration software is Live Meeting.
Microsoft has never been known for creating simple user interfaces and Live Meeting is no exception.