The members of Zotero community developed different plugins.
To install a plugin in Zotero:
1. Download plugin's
.xpi file to your computer
2. Click “Tools → Add-Ons” in Zotero
3. Drag the
.xpi for the plugin onto the Add-Ons window that opens
For the whole list of plugins go to:
Note: for apps and plugins for mobile devices, see mobile.