ResearchRabbit is a free research discovery tool that maps the landscape of papers related to a topic you're studying. Add papers to a collection, and it discovers related work — papers that cite the same sources, papers those papers cite, and papers on similar topics — surfacing connections that keyword search alone would miss. The visual network map makes the structure of a research field navigable. Email alerts notify you when new relevant papers are published. Zotero integration keeps your library in sync. The 'Authors' feature maps the collaborative network of researchers in your field. Priced at free, ResearchRabbit competes directly with paid discovery tools for anyone doing academic research. Its only limitation is depth of analysis compared to paid alternatives — the breadth is excellent.