What is Okular?
Okular is a multiplatform document viewer developed by the KDE community and based on Qt and KDE Frameworks libraries. Features:
- Supported Formats: PDF, PS, Tiff, CHM, DjVu, Images, DVI, XPS, ODT, Fiction Book, Comic Book, Plucker, EPub, Fax
- Sidebar with contents, thumbnails, reviews and bookmarks
- Annotations support
- Reading text aloud using the Qt Speech module
- Supports DRM restrictions of PDF files but this can be turned off in the options under "Obey DRM limitations"