Calligra Suite a part of the KDE community is a free and open source office suite for the desktop. It has applications for the office, graphics and project management. It was first released in 2000, and is written in C++ and uses the QT framework. It is licensed under GPL and LGPL.
Calligra Suite – a set of applications written to help you to accomplish your work
- Words – an intuitive word processor application with desktop publishing features. With it, you can create informative and attractive documents with ease.
- Sheets – a fully-featured spreadsheet application. Use it to quickly create spreadsheets with formulas and charts, to calculate and organize your data.
- Stage – a powerful and easy to use presentation application.
You can dazzle your audience with stunning slides containing images, videos, animation and more.
- Kexi – integrated data management.
- Flow – diagramming and flowcharting.
- Karbon – drawing vector graphics (no longer maintained.)
- Plan – project planning.
Source: from Calligra’s learn more page
Next Open Source Tuesday will feature the HandBrake project.