Commentum vs PDF-XChange Viewer
A side-by-side look at Commentum and PDF-XChange Viewer. For an in-depth review of either product, follow the links below.
Commentum
Online Services
Commentum is an open-source commenting system for websites. It allows site owners to easily add a commenting system to their site to facilitate user discussions. Key features include comment moderation tools, anti-spam measures, and customization options.
commentingdiscussionmoderationantispam
PDF-XChange Viewer
Office & Productivity
PDF-XChange Viewer is a free PDF reader and editor for Windows. It provides basic PDF viewing and annotation features like adding text notes, highlights, shapes, freehand drawing, and more.
pdfviewereditorannotationfreehand-drawing
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