LibreOffice ie previously known as OpenOffice which is an open source office suite including text editor, spreadsheet and presentation tools. Developed by The Document Foundation
License: Open Source
LibreOffice offers a more comprehensive suite with robust features and wider compatibility, making it ideal for users needing a full office solution. In contrast, Calligra Suite is more lightweight and integrated with KDE, appealing to users looking for simplicity and specific tools like flowcharting.