This WWF report provides a useful review of tools and technologies that can be used for monitoring (chapter 2) as well as a broader overview of approaches and lessons learned of community-based monitoring efforts related to tropical forests (but applicable to other ecosystems). The data collection tools that are described and analyzed in Chapter 2 include - Open Data Kit, Geodk, Geo-Wiki, Maobi DRC, Sound Recordings, Sapelli, Cybertracker, Interactive Forest Monitoring, and Participatory Mapping.