Penflip is an online collaborative writing platform that allows multiple users to create, edit, and manage text-based projects in real-time. It is designed to facilitate version control and track changes, making it ideal for authors, editors, and writers working together on documents, books, or articles. The platform provides tools for drafting, organizing, and reviewing work, and it supports exporting projects into various formats for publishing or distribution. Users can access Penflip via its website, https://www.penflip.com.