The Nebo app is discussed as a note-taking option, with mixed opinions compared to popular alternatives like Notability, which offers a recording feature that syncs notes with audio timestamps. Goodnotes and CollabNotes also provide similar functionalities. Obsidian is highlighted for its unique capability to create interconnected notes, resembling a personal Wikipedia, and is favored by some Ph.D. students for thesis management. Specialty notebooks with smart pens that record handwritten notes for later upload are mentioned as another option. Traditional methods of note-taking, such as using a physical notebook and later rewriting notes, remain a reliable choice for many.