EndNote, DEVONthink, Zotero, Mendeley, Citavi, BibDesk, JabRef, Paperpile, Bookends, ReadCube Papers, Biohunter, Docear, Researcher PRO, PDF Annotator, wizdom.ai, Julius, EasyBib, PaperShip, PDF Stacks, Bibliography.com, FoxTrot Professional Search, Peerlibrary, Reference Manager, Dedoose, consider.ly, BibGuru, BibSonomy, PDF Search, Weava, PubChase, KBibTeX, CATMA, Zenreader, Dovetail, BibMe, Crossref, DeepDyve, Provalis Research, I, Librarian, Bibfilex, Biblioscape, RefWorks, Refeus, Zoo for Zotero, UbikReader, Paperly, bibus, TextCite, Shipright, RefMe, DiscoverText, FingerPDF, ProCite, Surveytagger, PDF Assistant, Citationsy are some alternatives to Qiqqa.