The best free PDF reader apps do more than just act as a PDF viewer - any modern browser can do that. What I'm looking for is tools that go beyond that, offering commenting, collaboration, and ...

PDF is unarguably the most popular document format these days. PDFs are hard to edit and can be viewed on any device without compatibility issues, making them a perfect format for sharing documents ...

Nitro PDF Pro is one of the most full-featured PDF editors available and the strongest alternative to Adobe Acrobat DC. As Adobe Acrobat alternatives go, Nitro PDF Pro sits near the top of the heap.