Turnitin
Turnitin is an application that can be used in conjunction with an assignment dropbox in Moodle to grade written assignments. Student submissions can be scanned for plagiarism and an originality report can be generated that breaks down where textual similarities were detected. Turnitin also has a built-in feedback studio that allows you to make comments, highlight, use customized quickmarks and leave audio feedback directly on the students' submissions, and a Rubric Manager which allows you to attach a rubric to student assignments and grade them online in combination with the feedback studio.