This list is another request from Joseph Tychonevich at Greensparrow Gardens, and I'm not sure if he was meaning anything fluffy-looking (in which case Soleirolia soleirolii, baby tears, would count) or anything with pinnate/bipinnate/tripinnate foliage, in which case Zamia spp., cardboard palms, would count). So I've tried to restrict myself to stuff that qualifies either way, stuff that both looks fluffy and soft (doesn't mean it actually is soft, by the way) and has finely-divided foliage.
In practice, this seems to mean mostly ferns and palms, but I found a couple other options too. It's a tough category. Additional suggestions are welcome.
I like the look of a lot of these, but have had bad experiences with quite a few of them, too, and even the ones I haven't had bad experiences with tend to be difficult plants for most people. So I can recommend Araucaria heterophylla, which is pretty agreeable if you give it decently bright light and are consistent about watering; Davallia spp., which are a bit more challenging than most plants but are pretty reasonable, as ferns go; and Polyscias fruticosa var. elegans, which, like the regular P. fruticosa, is not quite as fearsome as its reputation would suggest.
I anti-recommend Pogonantherum paniceum, because my own plant needed so much water, so often, that I could only keep it going for four and a half months, and it didn't look so hot by the end of about two. I also discourage people from Chamaedorea elegans whenever I get the chance: I know there are people out there who can grow them and find them easy, but I am not one of those people, nor is WCW. In my experience, C. elegans either get spider mites, then black tips, and die, or they get black tips, then spider mites, then die. Unless they're in a greenhouse. Where they just get spider mites. Finally, I'd suggest the reader not try Selaginella kraussiana without the aid of a terrarium. I haven't tried the plant at all, personally, with or without, but they have pretty extreme moisture needs.
Adiantum spp. (maidenhair ferns)
Chamaedorea cataractum (cat palm)
Chrysalidocarpus lutescens (butterfly palm)
Didymochlaena trunculata (mahogany fern)
Howea forsteriana (kentia palm)
Nephrolepis exaltata cvv., in particular the cv. 'Fluffy Ruffles' (Boston fern)
Pellaea rotundifolia (button fern)
Philodendron bipinnatifidum (tree philodendron, selloum philodendron) (should this count?)
Polyscias fruticosa (ming aralia)
Schefflera arboricola (umbrella plant, umbrella tree) (should this count?)
Scyphularia pycnocarpa (black caterpillar fern, Davallia pentaphylla)
Selaginella erythropus (red club moss)