MS Power Point - (4:3)
MS Power Point - (16:9)
Apache OpenOffice - (16:9)
LaTeX
Overleaf
Before you begin writing talk to your supervisor which LaTeX-template you should use.
TU4U - Templates for title page
LaTeX - TU Graz Template published on Overleaf
Thesis Template EAS TU Graz by Tobias Scheipel; published on Overleaf