Simple Doc Organizer Alternatives

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, can be copied, tagged and modified either from the applications directly or from your own text editor.

Standard Notes is a simple and private notes app. It allows you to write and sync your notes across all your devices, including your iPhone, iPad, Mac, and web browser.

Evernote is a cross-platform, freemium app designed for note taking, organizing, and archiving.

A hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file.

Trilium Notes is a hierarchical note taking application.

Cryptee is a safety and privacy focused, encrypted and cross-platform personal data storage service. You can write personal documents, notes, journals, store photos and all sorts of other files.

DEVONthink is a solution to the digital age conundrum. It is your second brain, the one and only database for all your digital files, be they PDFs, emails, Word docs or even multimedia files.

Milanote is an easy-to-use tool to organize your ideas and projects into visual boards.

Notejoy is a collaborative notes app for you and your team. It helps you get your most important work out of the noise of email & chat and into a fast and focused workspace.

Very similar to Notational Velocity but for Windows.