The document summarizes the final report of the LCG RTAG (Real Time Applications Group), which assessed the needs for collaborative tools of the LHC collaborations. The RTAG found a large gap between requirements and availability of tools. It recommends that CERN establish a Collaborative Tool Service to coordinate tools for video/audio conferencing, meeting management, and document/application sharing for the LHC collaborations. The report provides cost estimates and recommendations to improve facilities at CERN and institutes.