ProjectForum looks like a powerful Wiki-like server:

"ProjectForum provides a powerful but easy-to-use solution for flexible workgroup collaboration and coordination of projects and teams over the web.

Build an intranet or project site where everyone can actively and directly contribute, without complex software or a full-time administrator getting in the way.

Use it for project planning, todo lists, design notes, task assignments, meeting notes, problem reports, team discussions, collecting feedback, research, brainstorming and more."