The use of content management systems (CMSes) in public history is a rel-atively new phenomenon that has greatly enhanced the possibilities of presenting,curating and narrating history online. As CMSes have become increasingly powerfuland easier to use, they obviate the need for comparatively costlier custom solutions,both in terms of time and financial investment. Archives, libraries, museums, insti-tutions, scholars and educators are making use of CMSes to showcase collections,accompany exhibitions, tell histories online and to build online communities andnetworks. This chapter discusses how content management systems support theseactivities and projects while also delving into more technical aspects. In doing sothe chapter focuses on open source systems which can be used by any scholar with-out incurring licensing fees, and are often supported by large user communities.