Scalar is a free, open source authoring and publishing platform that’s designed to make it easy for authors to write long-form, born-digital scholarship online.
Voyant Tools is a web-based text reading and analysis environment. It's designed to make it easy for you to work with your own text or collection of texts in a variety of formats, including plain text, HTML, XML, PDF, RTF, and MS Word.
Harvard WorldMap is an open source mapping platform developed to lower barriers for scholars who wish to explore, visualize, edit, and publish geospatial information.