Master PDF Editor
Master PDF Editor is a free and multi-platform, easy-to-use, but powerful and multifunctional program for working with PDF documents
ONLYOFFICE Desktop Editors
ONLYOFFICE Desktop Editors – free and open source, cross-platform office suite for editing documents, tables and presentations
LibreOffice
LibreOffice is a free and open source, multiplatform powerful office suite, which allows you to work with text, spreadsheets, presentations and others
Simple Diary
Simple Diary is a free and open source, simple and lightweight program for keeping a diary
SpeedCrunch
SpeedCrunch is a free and open source, multi-platform fast and high-precision scientific calculator controlled from the keyboard
sleek
sleek is a free and open source, multi-platform task management program that uses todo.txt format
Manga Reader
Manga Reader is a free and open source program for reading manga/comics from a local library
Semantik
Semantik is a free and open source program for creating mind maps for KDE, which helps you create presentations, dissertations, essays, reports
Qalculate!
Qalculate! – free and open source, cross-platform, simple yet powerful and versatile calculator
Elcalc
Elcalc is a free and open source, cross-platform simple calculator on Electron