He is not just skilled with Word, he knows well some basic and once you know the software used is not so important
Here i am quoting the video author himself, from his free online book
http://issuu.com/upir/docs/best_text_ef ... osoft_wordwhere show some very cool text effect, and explain that, once you know the trick then could be used also in Photoshop , Illustrator ,etc
He doesn't quote LibreOffice or Gimp but all would be cool logo effect for gimp too ,
...i didn't try but i believe most of the tuts in his e-book may be done with gimp too