Zotero

• To sort your references: click on the heading of the field you wish to sort. 
• To search for references: one simple search function  and one advanced search function .
• To eliminate duplicates: click on Duplicate Items in the left pane of your library.

Google Scholar Citations for Zotero is a plugin for auto-fetching the number of citations from Google Scholar.

The Zotero timeline allows you to visualize the items in a Zotero collection on a chronological basis, using either the publication date or the date you added the item to Zotero.

To create a timeline, go to the Tools menu, and select "Create Timeline". A timeline will be created for the collection which is open on your desk. You can navigate laterally in the timeline, change the defaut option "date published" to "date added" or "date modified", or highlight a specific search term in one of the 4 colors provided.

This screencast allows you to better understand how the timeline works.