Photo credit: a-papanton

1. Truphone: Mobile application allows you to make cheap calls from your mobile phone
2. Yaplet: Online service allows you to chat with people visiting the same webpage
3. IMified: Instant messenger add-on allows you to access web applications faster
4. Wridea: Project management tool allows you to create and manage different projects online

1. Truphone
   
   
   
   Truphone is a free software that turns Wi-Fi-equipped Nokia mobile phones such as the E61, into dual-mode phones that can make cheap calls over the Internet using Wi-Fi. When Truphone users get within range of a Wi-Fi service, their phone switches over VOIP and enables them to make cheap calls to any phone number. They also pop up as "online" to their friends on Google Talk, so it is clear to other people when they can make a free call to them.
   
   http://www.truphone.com/





2. Yaplet
   
   Yaplet is an online service that allows chat with people visiting the same web page. You simply type the URL of the website that you want to chat on, and Yaplet automatically turns it into a social network. You can also embed Yaplet on your website with a simple code and chat with everyone who's looking at your web page. Free to use
   http://www.yaplet.com/





3. IMified
   
   Imified is an instant messenger buddy that works across all major IM networks and offers access to a growing number of web applications, as well as productivity tools like notes, reminders, and todo's. Signing up is easy. You just have to send a message to the imified buddy on your favorite network to create an account. Free
   http://www.imified.com/





4. Wridea
   
   Wridea is project management tool that allows you to create a page for each project and different categories for each work type. With Wridea, your friends can participate on your ideas by commenting on them through the help of RSS feeds. Wridea lets you create, edit and delete your ideas, pages and categories smoothly and easily. Wridea is web-based and completely free to use.
   http://www.wridea.com/