As open educational resources (OER) becomes a more established concept, its growth and continued success not only center around the creation of new content but also depend upon the development and evolution of existing content, licenses permitting. The evolution of and persistent access to existing content requires easily editable works and the ability to download local copies of OER files so that no technical limitations hinder what the license permits. Such measures as text files, OpenDocument formats, and version control present a way to keep OER content editable and shareable, in compliance with licenses. Librarians are uniquely positioned to help users understand those solutions.