Zotero is a free citation manager with both desktop and web versions. It allows unlimited collaboration between users, but does have a smaller amount of storage space available for libraries. Zotero's web bookmarklet allows for quick webpage grabs, and it also imports information from library databases.  There is an extension for Microsoft Word, although the features are more limited than EndNote or Mendeley.

For detailed instructions on using Zotero in your Google Docs, see Zotero's documentation here.

Zotero will automatically pull PDFs that are openly available online, but you can also connect your Zotero to the HSHSL to get access to the PDFs we pay for. 

1. Open Zotero
2. On a PC, navigate to the Tools tab; on a Mac, navigate to the Zotero tab
3. Under General, look for Advanced
4. Copy and paste the link resolver into the section for "resolver" 
5. http://survey.hshsl.umaryland.edu/?url=