Photo credit: Alejandro Mendoza R

1. Transfer Big Files: Share any file up to 2GB via email
2. PixaMSN Portable MSN Messenger client allows you to connect to your MSN account
3. AJAXWorkspace: Assign tasks and manage projects for free
4. GroupLoop: Share files, discuss and manage your team online

1. Transfer Big Files
   
   Transfer Big Files is a free online service that anyone can use to share files online. With no registration needed (registered accounts can also manage files), you can upload any file up to 2GB of size and share it with anyone just by typing in their email address. You can also include a message for the recipients, add a password to protect the files, and it features a progress bar for you to monitor the file upload. Free to use.
   http://transferbigfiles.com/





2. PixaMSN
   
   PixaMSN is a portable MSN Messenger client which writes no files to your hard disk or registry so it can be stored and run completely on a portable device such USB flashdisks or portable hard disks. It allows you to log into your MSN and Windows Live Messenger accounts through a simple interface, automatically logging you in as invisible to other users. Once your logged in, you can change your status to online. Free to use.
   http://usuarios.lycos.es/pixador/





3. AJAXWorkspace
   
   AJAXWorkspace is a free web-based application which consists of an integrated suite of simple and easy-to-use collaboration functionalities. You can organize your tasks, share files and documents, manage projects and coordinate your team member. Individual and corporate accounts are available, with different storage space (50MB for the free version). Click here to check the other versions.
   http://ajaxworkspace.com/





4. GroupLoop
   
   GroupLoop provides a simple place for you to share and archive files, discuss with your team, and manage meetings with a web-calendar. The free account gives you up to 25 groups members, with one committee, 3MB of file storage, 12 calendar events, and unlimited messages between users. For other versions click here. 100% web-based, it is free to use.
   http://www.grouploop.com/