TagSpaces lets you organize, tag and browse your files, photos and documents on many platforms. It is great for

Browsing, tagging, viewing and editing of your local files directly in the app without the need of external applications
Creating and managing notes and web snippets (like in Evernote® but completely offline)
Creating your personal wiki system

Key Features:

File and folder management: TagSpaces provides a convenient user interface for browsing, viewing and manage files and folders.