Mectins are one group - Ivermectin, Abamectin, Moxidectin - All are lumped togather and worms become resitant to the whole group.
Azoles are another - Oxfendazole, oxbendazole, fenbendazole. These are generally only used for encysted strongyles as a five day double dose stomach tube. Where they are very effective. Normal worming? Not so much.
Then there are are the BZ's. I can only think of Benzimidazole at the moment. By itself, pretty useless - but add something like tetrahydropyrimadine and it brings it's kill rate up in line with the mectins, making it a fantastic rotational wormer.
Praziquantal is an ingredient that nabs tapeworm - So it is often added to Mectins to get Tapeworm.
Here in Aus we reccomend you do a year on mectin wormers, then a year on Strategy T which is a BZ + Tetra... whatever. Our best rotational wormer. It doesn't do bots, so you add in two mectin wormer at I think the end of Autumn and start of spring.