Love this site - Basecamp
One of those ideas that’s bound to work. Who doesn’t have problems with project management? Forget Microsoft’s PM. Here’s some free project management tools. These guys rightly focus on communication and collaboration. All the charts, graphs and guff are also there. Assign to-dos and tasks. Post messages, gather feedback, simple scheduling and permissions, share files internally or with clients and track people's time. Over 100,000 sign ups and rising.
TRULY easy to use. No downloading, installation.