Intrawebs are webs dedicated to the community of a corporation. Being on a private network of the company, intrawebs can include a whole family of applications that could not be made available on the public web for confidentiality reasons: corporate applications. The corporation is an existing community that needs to set up and maintain collaboration to attain professional objectives. Web technologies propose shared application supporting communities of practice, of interest, and more generally speaking, knowledge management. They can support collaborations: synchronous communication, expert matching, internal FAQ, collaborative document edition, case-based memories, project management, workflows, etc. Within a company the existence of such community and of its shared professional interests makes the intraweb a selected place to develop and experiment new web-based solutions.