Colligo offers software for secure, ad hoc workgroups: The software avoids the need for a central server for collaboration over Wi-Fi. Version 4.0, available later in February for $99 per user, secures transactions via IPsec, and offers the kind of group tools for chatting, file exchange, and white-board brainstorming. It can also work as an ad-hoc bridge to connect a group through one user's Internet access.