Okular
Okular is a multiplatform document viewer developed by the KDE community and based on Qt and KDE Frameworks libraries. It is distributed as part of the KDE Applications bundle. Its origins are from KPDF and it replaces KPDF, KGhostView, KFax, KFaxview and KDVI in KDE 4. Its functionality can be embedded in other applications.
Original author(s)
History[edit]
Okular was started for the Google Summer of Code of 2005 by Piotr Szymański.[1][2] Okular was identified as a success story of the 2007 Season of Usability.[5] In this season, the Okular toolbar mockup was created based on an analysis of other popular document viewers and a usage survey.
When it was ported to Qt 5 in December 2016, the version numbering jumped from 0.26 to 1.0.[6]
Since September 2019, Okular has been available in the Windows Store.[7]
In December 2020, the software versioning scheme was changed from sequence-based identifier to CalVer.
In February 2022, Okular was awarded the Blue Angel environmental label award by the German government for sustainable software design.[8][9]