This document summarizes the evolution of volunteer technical communities (VTCs) from 1995 to 2011. It describes how VTCs have used various tools like blogs, wikis, and mapping to help with crisis response for events like earthquakes, hurricanes, and oil spills. It provides examples of software and platforms that have been developed by VTCs to help with situational awareness, resource management, and communications. It also discusses trends like open data, crowdsourcing, mobile apps, and ensuring interoperability through open standards. The document concludes by discussing the future of virtual operations support teams collaborating through CrisisCommons.