Alternatives to PDF Stacks for all platforms with any license

Zotero

Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.

Free Open Source Mac Windows Linux Chrome Safari ... Microsoft Office Word Google Drive - Docs LibreOffice Firefox
Browser integration Export to CSV Firefox Extensions Importing from webpages ... Libre Office Integration Compatible with Microsoft Office Microsoft Office integration Multiple languages Save web page for offline use Sync between devices Support for WebDAV Add a feature

262 Like
Mendeley

Mendeley helps manage and share academic knowledge: Mendeley Desktop is free academic software (Windows, Mac, Linux) for organizing and sharing research papers and...

Freemium Mac Windows Linux Web Android ... iPhone iPad
Browser integration Libre Office Integration Microsoft Office integration PDF annotation ... Real time collaboration Word integration Add a feature

254 Like
Qiqqa

Qiqqa is free award-winning knowledge-, research- and reference management software. If you're serious about getting the most from managing your publications, PDFs...

Freemium Windows Web Android Android Tablet
PDF annotation Bib Tex Sniffer Automatic Tagging Brainstorm mode ... Citation detection Cloud sync Content analysis Document annotations File Searching Full text search Library section Metadata Search PDF OCR Plaguarism detection Portable Qualitative Data Analysis Real time collaboration Optimized for Touch screen Add a feature

322 Like
Docear

Docear is a unique solution to academic literature management, which helps you organizing, creating, and discovering academic literature. The 3 most distinct features...
- Discontinued Development and support of Docear have been stopped in August 2017. Last version, 1.2, released in December 2015, can be still downloaded from the official website. http://www.docear.org/2017/02/05/docears-online-services-are-down-recommendation-user-registration-backup/
Free Open Source Mac Windows Linux Web
PDF annotation Mind Map view Portable Add a feature

63 Like
JabRef

JabRef is an open source bibliography reference manager. The native file format used by JabRef is BibTeX, the standard LaTeX bibliography format.

Free Open Source Mac Windows Linux
Autocompletion Automatic file renaming Export citation File-sync ... Grouping entries Add a feature

72 Like
EndNote

A reference management software, used for searching online publication databases, & managing publications / bibliographies, with the ability to insert the references...

Commercial Windows Web iPhone iPad
Compatible with Microsoft Office Add a feature

35 Like
Academia.edu

is a social networking website for academics. The platform can be used to share papers, monitor their impact, and follow the research in a particular field. It was...

Freemium Web
No features added Add a feature

15 Like
BibSonomy

BibSonomy is a system for sharing bookmarks and lists of literature (BibTex format). When discovering a bookmark or a publication on the web, you can store it on our...

Free Web
Knowledge Management Real time collaboration Add a feature

16 Like
Weava

Weava is a collaborative workplace for research offering an easy way to highlight, organize and collaborate on your research articles.

Freemium Web Chrome
PDF annotation Text Highlighting Add a feature

8 Like
Papers

Papers helps you collect and curate the research material that you're passionate about.
- Discontinued Merge with READCUBE software as Readcube Papers
Commercial Mac Windows Web iPhone iPad
No features added Add a feature

38 Like
Paperpile

Organize your research papers in a Gmail-like web app, sync your PDFs to Google Drive and cite your references in Google Docs.

Commercial Web Chrome Google Drive Google Drive - Docs Google Scholar
Sync with Google Drive Add a feature

41 Like
Citavi

Reference management and knowledge organization with integrated task planner. Solution for work groups with data sharing in intranet available.

Freemium Windows
Intuitive Nodes Knowledge base Knowledge Management Add a feature

38 Like
wizdom.ai

wizdom.ai (formerly colwiz) is a free and comprehensive research management software for researchers, academics and students. With the wizdom.ai android app, you can...

Freemium Mac Windows Linux Web Android ... iPhone Android Tablet iPad
No features added Add a feature

17 Like
EasyBib

Automatic works cited and bibliography formatting for MLA, APA and Chicago/Turabian citation styles. Now supports 7th edition of MLA. Easybib truly makes the life of...

Freemium Web Android iPhone Chrome OS Google Drive - Docs
Browser integration Add a feature

12 Like
Bookends

Bookends is a commercial reference management software package for Mac OS X that is used to manage bibliographies and references when writing essays and articles. Its...

Commercial Mac iPhone iPad
No features added Add a feature

10 Like