EndNote, Mendeley, Citavi, BibDesk, Qiqqa, JabRef, Paperpile, Highlights, Bookends, Researcher PRO, EasyBib, PDF Stacks, FoxTrot Professional Search, Peerlibrary, Reference Manager, BibGuru, BibSonomy, PDF Search, OutWit Hub, Weava, PubChase, KBibTeX, Zenreader, Auratikum, BibMe, DeepDyve, I, Librarian, Biblioscape, RefWorks, UbikReader, bibus, SciPlore MindMapping, TextCite, Utopia Documents, RefMe, SmartPredict, FingerPDF, ProCite are some alternatives to ReadCube Papers.