These days it's just software. You have free software that gives you a limited user experience or timed trial to decide if you want to buy the full thing.
Look at any app store and look at the free rankings. It's practically full of nothing but "lite" versions that only exist to give you some features to help you decide whether you want to pay for the full version.
If anything 'shareware' is more alive than ever although it goes by different names these days, 'lite', 'freemium', etc.