NimbleNotes is described as 'online note taking and study platform, designed to help students learn more efficiently. Our digital notebook improves your learning workflow with instantly generated flashcard decks, study session analytics, and advanced filtering capabilities' and is an app in the Education & Reference category. There are more than 100 alternatives to NimbleNotes for a variety of platforms, including Windows, Mac, Online / Web-based, Android and iPhone. The best alternative is Joplin, which is both free and Open Source. Other great apps like NimbleNotes are Standard Notes (Freemium, Open Source), Google Keep (Free), Microsoft OneNote (Freemium) and Evernote (Freemium).
Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor.
Anki is a program which makes remembering things easy. Because it is a lot more efficient than traditional study methods, you can either greatly decrease your time spent studying, or greatly increase the amount you learn.