Zotero is a free bibliographic software tool that can be added as a browser plugin to easily insert citations into documents. It allows users to search for references on sites like Google Scholar, import citations into Zotero with one click, and organize references with tags and notes. When research is complete, Zotero can export selected citations into a file in a format like Wikipedia citation templates, so those references can be copy and pasted into a Wikipedia article with reference tags.