Hi Albert,
Cacti and succulents are plants adapted to dry weather. They need very little water compared to, say, ferns or roses.
Potting soil is not a good choice for cacti or succulents because it retains a lot of moisture. Your collection (except for the ferns) needs a medium that does not hold a lot of moisture and drains well. Placing your pots in saucers is not a good idea because the water accumulates there, as your photos show. That's not good for any plant and bad for the ones you have.
Cacti need lots and lots of sun, a well-draining medium such us cacti & citrus soil, very little water.
Succulents need sun (and partial shade in very hot and dry weather), same soil as for cacti and a bit more water than cacti.
I would get the proper medium, repot the plants and use no saucers. In your climate, you'll have to give them the best sun exposure available. Bring them in when the weather is below 32 F.
Good luck with your collection. Your zone is rather cold and too humid for the plants you've chosen so you'll have to try and make them as comfortable as possible.
