Existing guidelines on how to develop web applications with accessibility are currently not applied in many organizations. The lack of "closeness" of these guidelines to the developers is one of the most significant reasons for this scenario, as developers often do not know them or find it difficult to apply them. As a proposed solution to increase the use of guidelines in development practices, we present a proposal of a collaborative tool for sharing and disseminating experiences. The proposal is based on capturing and disseminating Design Rationale (DR) related to experiences with developing web artifacts, following the Web Content Accessibility Guidelines (WCAG) 2.0.