CryptoTE - CryptoTE is a text editor with integrated strong cryptography.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.
Standard Notes - A safe place for your notes, thoughts, and life's work
Daybreak - An intelligent to-do app that learns when to remind you
Startup Notes - Most actionable advice from each Startup School speaker