Photo credit: Norebbo

1. Grou.ps: Create groups and collaborate with other people online

Oosah: Upload any type of file, get it hosted and share it via a public link

2. MSC Messenger: Text-chat, have video conferences and share files with your friends
3. UVC: Online project management and instant messenger lets you communicate with your team

1. Grou.ps
   
   Grou.ps is a new collaboration tool that connects groups of people online. You can create your group for free, and invite as many people as you want: you can chat in real time, share files across the team, run a shared calendar to keep track of the on-going tasks, communicate asynchronously through a forum or a wiki, and get lots of integrated services such as Picasa and Flickr for images, YouTube for videos, Twitter for updates, and so on. Free to use.
   http://grou.ps/
2. 
   
   Oosah
   
   Oosah is a free service that gives you 2GB of storage space, where you can upload any type of multimedia file from your PC, or get it transferred directly from your Picasa, Flickr, YouTube or FaceBook account. You can create folders to organize your files and bring them with you wherever you are and, by clicking on any file, you create a public/password protected sharing link for people to access that file. Free to use, registration needed.
   http://www.oosah.com/





3. MSC Messenger
   
   MSC Messenger is an instant messaging application that allows you to chat with friends. Its interfaces is really similar to popular instant messaging application such as Microsoft's or Yahoo's, and it features a wide contact list, video/voice chat, text-chat, voice mail, SMS, and file sharing capabilities. The software is free to download, with a small 2MB setup file, and use.
   http://netsms.free.fr/msc/portal/?m=home





4. UVC
   
   UVC is an online project manager and organizer combined with an instant messenger. Available for any platform, it can be installed for free, and you can add your friends in there so that you can start assigning tasks, send emails, share files, but also text-chat in real-time and have video conferences with other members of the group. Free to download and use.
   http://www.universalvillage.net/