Zephyrus is a client-server/p2p hybrid application that lets companies provide secure, real-time messaging and collaboration facilities to their employees and customers. It provides its users with a diverse and sophisticated suite of collaboration tools for both synchronous and asynchronous communication. The feature set includes workgroup creation and management, voice conferencing and two-way voice chat, instant messaging and group discussions, peer-to-peer file sharing, calendaring, and shared whiteboarding, which lets collaborators simultaneously markup a document in real-time.