In the last few years much progress has been made in digital preservation theory and technology. Yet for many small to medium sized archives and memory institutions there are still significant obstacles to implementing best practice solutions to meet the digital continuity requirements of their user communities. Three critical barriers are intellectual complexity, technical complexity and cost. Inspired by a call to action in a recent UNESCO Memory of the World report [1], the goal of the Archivematica project is to lower each of these barriers and give archivists the tools, methodology and confidence to begin preserving digital information today. Archivematica integrates a number of open-source tools to create a comprehensive digital archives system that is based on a practical analysis of the OAIS functional model. The system is free and full access is given to the source code repository and technical documentation under the open-source GPL license.