An overview of Act's features is available in Act::Manual::Features.
The Act user manual is divided in several subsections, aimed at the different kind of users of the Act conference toolkit:
This section contains information for conference organiser hosted on a web server using Act.
This section contains setup details and performance tricks for application providers: people that host an Act instance on their system.
This section contains detailed explanations on the inner workings of the Act toolkit and how to add components to it.
Author and contributor credits, with a bit of project history.