The software Google's browser uses to show PDF files has been proprietary for years, but now it's an open-source project called PDFium that others can scrutinize or use themselves. Stephen Shankland ...

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 ...

Gaaiho Reader is a is a feature-rich, free PDF viewer with full support for all of the content embedded in a typical PDF document like form-filling, multimedia, and links. Unlike most free PDF viewers ...

PDF Reader Pro lets you insert, replace, or delete text and images just like you would in Word, and you can rearrange pages, merge files, crop, or rotate with ease. It also includes a batch processor ...