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.
Synology Note Station - Without needing to spend money on Evernote, Synology Note Station provides a desktop client to organize all your random notes in one place.
A5 - Takes notes in your browser. Elegant & simple.
Pocket Lists - World’s Friendliest To-Do List App
Knotable - Cut the noise out of busy email threads
UpNote - A beautiful and clean cross-platform app for notes organizer