Coolors.co - The super fast color schemes generator! Create, save and share perfect palettes in seconds!
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.
Polarite.app - A.I. assisted color scheme generator
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.
Rainglow Color Themes - 320+ color themes for a variety of editors and software.
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.