Venus flytraps (Dionaea muscipula) – Great candidates. They don’t require high humidity, but greatly appreciate it. Flytraps stay relatively small, so are good candidates for ornamental terrariums. Respect dormancy periods.
Tropical Pitcher Plants (Nepenthes) – Will require larger terrariums that maintain high humidity, with some ventilation. Nepenthes are hard to grow outdoors in many areas, so fish tank terrariums and greenhouses are the most common way to grow them.
Sundews (Drosera) – many can be displayed in smaller ornamental terrariums. For larger collections, or plants that need room to spread out (I’m looking at you Drosera binata dichotoma ‘Giant’), larger fish tank-type terrariums will be better.
Butterworts (Pinguicula) – Some species really need the higher humidity of a fish tank terrarium, while others simply enjoy it. Many can be grown in shallow, ornamental terrariums, but remember to respect dormancy periods.
Sun Pitcher Plants (Heliamphora) – Enjoy high humidity, and some get fairly large, so I’d recommend using a fish tank terrarium, here.
Australian Pitcher Plants (Cephalotus) – Enjoy the higher humidity and temperature controls, so use a fish tank terrarium for Cephalotus.