Zotero for starters

Zotero uses a folder system similar to EndNote (Online or Desktop).  

Folders in Zotero are called Collections.

The default is My Library, which contains all the references: similar to EndNote Libraries.

To set up a new folder and add items:

• Select File above the folder icon top left, then New Collection in the drop-down menu
• Name the folder and click OK 

• Click and drag items from your list in the centre to the required folder 

For full details, see the Zotero Support page on Collections and Tags.