Existing tools for supporting parallel work feature some dis- advantages that prevent them to be widely used. Very often they require a complex installation and creation of accounts for all group members. Users need to learn and deal with complex commands for eciently us- ing these collaborative tools. Some tools require users to abandon their favourite editors and impose them to use a certain co-authorship ap- plication. In this paper, we propose the DooSo6 collaboration tool that oers support for parallel work, requires no installation, no creation of accounts and that is easy to use, users being able to continue working with their favourite editors. User authentication is achieved by means of a capability-based mechanism.