Photo credit: Andres Rodriguez

1. Velvet Puffin: Collaborate with people from other IM networks all in one place sharing files, images and videos
2. ChatMaker: Type a name, share the URL and click go to create your free online chatroom
3. 4Shared: Store text, audio, video, photos and other files, and share them with other people
4. Gliffy Online: Online diagramming application allows you to create mind maps collaborating with your team

1. Velvet Puffin
   
   VelvetPuffin is a new collaboration tool that allows you to collaborate with people, all in one place. You can invite people from other IM networks, as Yahoo!, MSN, AOL, and ICQ, to chat, share files, photos, videos(from your PC or video services like YouTube, Google Video & Metacafe ), make polls and more. It is completely web-based and you can download a small plugin for Win, Mac and mobiel phones. Free
   http://www.velvetpuffin.com/





2. ChatMaker
   
   ChatMaker is an online service that enables you to create online chatrooms. It is really fast and easy to use: make up a name for your chat, copy and paste the URL to anyone you want and click go. Chatrooms can be stopped at anytime and they support an unlimited number of people. It is free to use with no registration is required.
   http://www.chatmaker.net/





3. 4Shared
   
   4Shared is an online data storage system that you can use to store your text, audio, video, photo, and other files and share them with others. You can invite anyone to see and edit your files, upload their files in your folders, even if they're not registered users. The free version gives you 1GB of free storage or you can check the other plans here.
   http://www.4shared.com/





4. Gliffy Online
   
   Gliffy Online is a online diagramming application that works in any browser and that you can use to create mind-maps, charts, website layouts, and invite as many people as you want to collaborate with you. With the free version you can create up to five diagrams and upload images to display in the map with up to 2MB of free hosting. You check the advanced plan here. Free.
   http://www.gliffy.com/online/