PDF Studio Viewer™ is a cross-platform PDF reader that is reliable and easy to use. PDF Studio Viewer can annotate PDF documents and fill interactive forms. For more editing features, Qoppa Software publishes PDF Studio Standard and Pro editions.
PDF studio viewer is a great alternative when you are working on pdfs on a Linux platform. Even on Windows it offers more text annotation feature than a comparable competition. It offers various viewing modes, a facility to invert colors and a better reading mode. Bookmark pane looks more sharp and concise. Overall a very pleasant reading experience.