Ouff, a fair few of the big players:

• MS Office > LibreOffice, it's not even remotely a contest. This is not because of any personal preferences, nor because of functionality. I'd just be an asshole for being the guy who breaks interoperability, which we have long established. Since this is squarely a work-first product, and everyone is just trying to get through they day and go home to their families, I won't make their day worse. Hence, MS Office preferred.
• Photoshop > GIMP. The latter is good for simple edits, but anything even moderately complex is not only far easier in Photoshop, it's also flat out faster, owing to far better hardware utilization.
• Google Maps > any alternative really but specifically OSM, for cars and public transit (I don't hike much but I heard good things about OSM for hiking though there are of course specialized apps for that since you want to bring specialized hardware for serious trips). While I can make OSM work, it's just such a hassle, and often so buggy and wrong I might as well just wing it entirely without navigation then. In particular for public transit.