It's a really simple website which you can bookmark and go back to whenever you want, to paste or jot down any random notes you might want to whilst browsing the web.
Sans Forgetica - Scientifically designed font to help remember study notes
Buno - Simple Note Taking - Simple, minimal & easy note-taking
conotes.io - Generate PDFs in Cornell format within your browser
A5 - Takes notes in your browser. Elegant & simple.
AnkiApp - AnkiApp is a flashcard app for iOS (iPhone + iPad), MacOS, and Android. Get flashcards on any topic. Tracks progress and syncs automatically.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.