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.
KosmoTime - The to do list with super powers
Standard Notes - A safe place for your notes, thoughts, and life's work
EveryPlan - Routines to promote wellbeing
Joplin - 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, tagged and modified either from the applications directly or from your own text editor.
Centered - Centered helps you get into a Flow State faster and stay there longer so you can do your best work.