Some of the most popular software programs for non-fiction editing include Grammarly, ProWritingAid, and the Hemingway Editor. Grammarly is an online writing assistant that can help writers and editors identify and correct grammar, spelling, and punctuation errors. ProWritingAid is a comprehensive writing assistant that offers many of the same features as Grammarly, but also includes additional tools for analyzing readability, repetition, and sentence length. The Hemingway Editor is a desktop app that analyzes writing for readability, complexity, and clarity, and provides suggestions for improving sentence structure, word choice, and overall readability.