EndNote Basic is the free version of the powerful EndNote citation management software.
EndNote Basic allows you to collect and organize up to 50,000 references. You can collaborate with other EndNote Basic users, insert citations into Word Documents, create bibliographies and store up to 2GB of file attachments.
A comparison of versions of EndNote is available here.
Here are some ways to get started with EndNote Basic:
PDF version of the handout distributed in our Zotero workshops
Here are some alternative citation managers: