A colleague approached me today to ask for suggestions for a new class she is teaching in the fall. One of the things she wants her students to do is keep an online journal (private, not shared with the world) and allow the teacher to view excerpts during the semester. I came across a free app called Penzu, which looks liked a sheet of lined paper when you view it online. Students can email parts of their journal to the teacher and don't have to worry about saving their entries, because Penzu has an autosave feature. Here's a video which gives an overview of Penzu: