This document compares and evaluates two video conferencing services: ooVoo and Dimdim. It provides an overview of the key features and technical requirements of each service. Both offer free basic features with additional premium features available through paid plans. The document recommends Dimdim overall for its wider range of collaboration tools, larger meeting capacities, and integration with other platforms. It notes Dimdim does not require downloading software and can support meetings of up to 1000 attendees.