activeCollab Corporate edition includes an optional module that enables you to export project information as a mini, static HTML website. Projects exported in this format do not require any web server to run (they can be opened with just a web browser) making them perfect for archiving projects.
To install the Project Exporter module, go to the Administration > Modules page, and install it from the list of Available Modules:
Once the Project Exporter is installed, the Export Project option will be available under the Options drop-down menu on the Overview page of every project:
activeCollab also lets you pick which project data you would like to have exported: