PDF Annotator Alternatives

Zotfile is a Zotero plugin to manage your attachments: automatically rename, move, and attach PDFs...

Foxit Reader is a free and light-weight multi-platform PDF document viewer.

The end-to-end digital workflow and collaboration solution trusted by over 1 million AEC professionals worldwide. Revu delivers award-winning PDF creation, editing, markup and collaboration technology designed for AEC workflows.

PDF-XChange Viewer is an alternative viewer for PDF files that enables you to view and annotate PDF...

PdfHighlights extracts and exports all your PDF highlights and PDF annotations from all your PDF files into a single report.

BargeOps is a full-featured towing, fleet, freight contract, and terminal management software solution that provides management and planning, billing, and reporting functionality for Inland Marine Companies

PDF Reader X is a nest in the class PDF reader, PDF annotator and PDF editor for the Mac OS X operating systems.

Xodo is the ultimate cross-platform PDF viewer and annotator. And it’s 100% free.

The smallest, fastest, most feature-rich PDF editor/viewer available

Qiqqa is a free research and reference management software. It can be used in many organizational projects from the academic to the personal to the business endeavor. Read more about Qiqqa.

Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.

PDF Assistant - simple in use application, that let you easily interact with any pdf file.

Procore is the world's most widely used construction project management software. Easy to use, mobile platform with unlimited user licenses.