Calligra Suite is a free open source office suite by KDE. It contains applications for word processing, spreadsheets, presentation, databases, vector graphics and digital painting.
Calligra is mainly created for the KDE desktop manager, but it will work in Gnome and all other DEs as well. However, for non-KDE system, you will have to install a bunch of KDE files for it to work.
Calligra Suite is available for Linux, BSD and KDE
Proprietary applications it could replace:
- Microsoft Office Suite
- WPS Office