CryptoTE - CryptoTE is a text editor with integrated strong cryptography.
Better Notes - Simple notes app that ties notes together with #hashtags
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.
Collected Notes - Simple and powerful note-taking & blogging platform.
Daybreak - An intelligent to-do app that learns when to remind you
Startup Notes - Most actionable advice from each Startup School speaker