The paper summarises experiences from the last decade of using Information and Communication Technology (ICT) tools for collaboration over local networks and Internet. An overview is given over how the collaboration tools have developed and which functions they can support during Internet supported collaboration. The collaboration can take place at the same or different places and at the same or different times in more or less virtual environments. Experiences are gained from research and education and from collaboration with industry. Views are also presented on which direction we can expect future development of ICT based tools to support collaboration and knowledge sharing in a building process context.