Photo credit: Orla

1. ChatCreator: create private chat rooms and invite people to join them
2. Answerbag: online community enables you to connect with others and share knowledge about every topic
3. Upcoming: social event calendar that allows you share events with friends and family, and syndicate your calendar to your own site
4. twttr: social text messaging service launched by Odeo that displays your status to a group of people that you choose








1. ChatCreator
   
   
   
   ChatCreator is a web-based service that allows you to instantly create private chat rooms and invite people to join them. You simply have to choose a name for your chat room and ChatCreator will automatically create it and host it on its server. In order to invite people you need to copy the link that ChatCreator will generate and give it to them. ChatCreator does not require registration and it is free to use.
   
   http://www.chatcreator.com/





2. Answerbag
   
   Answerbag is a community that helps you connect with others and share knowledge about every topic. If you have a question, you can submit it to the other members and get an answer. Every bit of info on this site can be voted on, so only trustworthy answers are promoted. Answerbag is a free service and requires registration.
   http://www.answerbag.com/





3. Upcoming
   
   Upcoming is a social event calendar that allows you to manage and share events with your network of contacts and to freely syndicate and re-publish any such group shared calendars on your own site or blog. The Upcoming Dynamic Badges lets you post your public event watchlist, or a group's event list to your online blog or journal. Free to use.
   http://upcoming.org/





4. twttr
   
   twttr is a social text messaging service launched by Odeo that displays your status to a group of people that you choose. By sending a text message to a short code, you can indicate your location information, your mood information or whatever and share it with people who are on your social-mob. twttr works best from your cell phone when you are out, but you can check it on the web too. Those in Canada will not be able to send SMS to twttr's short code (which is 40404). Instead, after they sign-up and receive your password, they can send updates to the number 415-283-8611. twttr does not require installation and is free to use.
   http://twttr.com/