We have had these two plants for a couple of years, and they originally come clippings from my great grandmother in California. As far as we were told, they are some sort of jades (genus Crassula), however we don't know what species and have had little to no luck identifying them. As you can see from the pictures (the leaves near the bottom tend to yellow, I think they just don't receive enough light), the leaves are mostly round with ridges on the edges. The plants are tall and, since we brought them inside for the winter, have been starting to grow small, pink, pitcher-like flowers. The plants tend to grow very well through the roots, cuttings, and single leaves. They also have been slowly gaining a more wood-like stem. The one pictured is about 30 inches tall (76.2 cm) and the one not pictured is about 36 (91.44). We would very much like it if someone could tell us what our plants are, as nothing seems to come up on google.

My guess is Kalanchoe blossfeldiana. It's a bit stretched out and needs more light.

And good advice too.

@hlutzow Thank you so much! These are more my mother's plants than mine, so I will need to convince her this is what they are, and I also realized they aren't hardy in our zone so we'll need to figure something out. I'm not huge into plants and don't know all that much, how would we go about helping with the stretching?

You might look into plant lights, there are a lot of different types and styles. If you don't have any other way to give the plant more light, they work well.

Find a sunny window sill.

If you don't want to drop the cash for a 'plant light' you can use a regular lamp and a 'daylight spectrum' bulb, 5000k-6500k. But, a sunny windowsill will work quite nicely. Just make sure there isn't a cold draft at that windowsill as well.