The document discusses useful Drupal modules for various functions like content creation, theming, importing data, accessibility, and social sharing. It recommends modules like CCK and Views for building custom content types and displaying content, Backup and Migrate for backing up the database, and Mobile Theme for customizing the mobile view. The document also lists distributions like Open Atrium, UberDrupal, and Pressflow that integrate common features to provide an out-of-the-box solution for specific use cases.