The National Science Digital Library Repository (NDR) was built on the Fedora Commons Repository software. Three of the primary projects included the repository API to connect to the repository, harvest for populating the collections, and search for discovery of resources. In addition to the nsdl.org website, there were many other projects to augment and integrate with the library including development toolkits, educational tools, content management software, blogging and wiki systems with custom plugins, etc.
The list below provides links to the project files found in the code versioning system (CVS and Subversion). More information on the core technology can be found in the NCORE and TNS websites and Community wiki pages.