Top Alternatives to Zotero

Qiqqa is award-winning research management software, designed for commercial and academic researchers.

Mendeley is a free reference manager and an academic social network.

TheBrain, formerly branded PersonalBrain, is a mind mapping and personal knowledge base software.

DEVONthink a document and knowledge management app for the Mac.

JabRef is a reference management software that uses BibTeX and BibLaTeX as its native formats and is therefore typically used for LaTeX.

Polar is an integrated reading environment to actively read, annotate, create flashcards, and track progress.

WizNote is a cross-platform cloud based note-taking client.

Docear is an academic literature suite. Docear bundles several applications for academics. As of now, these applications are BibTeX based reference management, mind mapping, and some pdf management capabilities.

Citavi is a reference management program.

Papers helps you collect and curate the research material that you're passionate about.

Paperpile is a web-based reference management software, with special emphasis on integration with Google Docs and Google Scholar.

EndNote is a commercial reference management software package, used to manage bibliographies and references when writing essays and articles.

ReadCube is a desktop and browser-based program for managing, annotating, and accessing academic research articles.

BibDesk is an open-source reference management software package for macOS, used to manage bibliographies and references when writing essays and articles.

SCIENTILLA is a free scientific register for organizations and researchers.

colwiz (collective wizdom) is free web, desktop and mobile based research management software.

BibSonomy is a social bookmarking and publication-sharing system.