This document summarizes a presentation about the open source museum collection management software Pachyderm. It provides a brief history of Pachyderm, noting it started as a tool for one museum and became open source in 2005. Since then over 20 installations have been set up for museums and universities, with thousands of worldwide users. The presentation identifies key factors for successful open source software: active user and developer communities, various support mechanisms, comprehensive documentation, standards adoption, and clear transition planning.