myPoli - Gameified to-do list and habit tracker.
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.
YourHour - YourHour is an app by Mindefy labs through which you can easily overcome with your phone addiction by monitoring your phone usage.
Standard Notes - A safe place for your notes, thoughts, and life's work
iBetter - iBetter app comes up with features to help you in fighting bad habits and developing new habits through your smartphones.
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.