I tried using Zotero on scientific journal sites such as PLOS, Nature,Science, Elsevier’s Science Direct and it works perfectly. I have tried all their claimed features and they work seamlessly. When compared to commercial equivalents like Endnote and R
Zotero. Free, easy-to-use research tool. Gathers and organizes full text articles, web pages, citations, or bibliographies. Lets you annotate & share your research. Like a cross between EndNote, iTunes & Onfolio, or BibTeX, music metadata finders, and F