Hitchhiking works usually well.
Blackriding trains is also possible (especially for short distances, e.g. reaching your hitchin spot), if you don't mind getting bad karma..
Wild camping is generally tolerated especially in the mountains. Hospitality exchange and spontaneous hospitality do work in cities especially if there universities and youngsters around like in Innsbruck and Vienna.
Paid accomodation is usually expensive (average european prices)
Generally good wifi. Around universities and libraries also free computer often.
Extremely rentable. Austrian cities may grant you your highest busking income ever.
There are usually quite severe rules, permit and regulation to follow but, if you are foreigner, you don't speak much German and you don't plan to stay too much in town (few days maximum weeks), you might be lucky and never meet undercover cops/guards checking you, if it happens you won't probably get any fine, unless you behave unreasonably..