Photo credit: Peter Galbraith

1. Spreed: Web-based tool allows you to set up video conferences and share Power-Point presentations
2. Mig33: Phone-based application lets you access many instant message services and make calls
3. Wayki: Create links to location on a map and share it with other people
4. Renkoo: Web-based service allows you to set up appointments with friends and colleagues

1. Spreed
   
   
   
   Spreed is a web-based tool that allows you set up video conferences. Spreed integrates whiteboard, chat, video conferencing, screen sharing, file transfer and Power-Point presentation sharing. It can be used on PC and Mac and it is free to use up to three participants.
   
   http://spreed.com/





2. Mig33
   
   Mig33 is an easy-to-use application that you simply download onto your phone and allows you to chat with your friends on instant messaging services like MSN, Yahoo and AIM. It doesn't matter whether they are with mig33 or not, you can message them without changing applications. It also allows you to make cheap calls at very low rates rates and to send SMS messages just by selecting who you want to call from the contact list or by entering the number. Free
   http://www.mig33.com/
   







3. Wayki
   
   Wayki is a free service that you can use to create links to locations on a map so that you can easily share them with others. Anytime you want to show someone where something is, you can use Wayki. It lets you add your own content and pictures to the markers that you create. You don't have to create an account to start using it. Free
   http://www.wayki.com/
   





4. Renkoo
   
   Renkoo is a service that uses the Web, IM, text messages, and email and it lets you communicate with your friends and set up appointments with them, wherever you are. You can decide on a place and time to get together without completely filling up your email box or spending all day on the phone. Free to use
   http://renkoo.com/