Shelfinder

Shelfinder adds a floating shelf to your Mac, integrated with Finder.

Drop files, folders, images, PDFs — and others — and keep them accessible while you work. It makes moving and organizing files much quicker, especially when juggling multiple windows.

It supports:

• Dragging files from Finder into the shelf
• Dropping them anywhere on the system
• Visual organization of items in a clean, native UI
• Groups of files