Hey I got this plant last December and its grown so much I don't know what kind it is, the leaves are starting to turn yellow at the base I'm not sure what I'm doing wrong since I've recently put it in a larger pot. Any advice or name for the plant? I'm talking about the very tall one. The leaves curl down but they weren't originally like that as you can see when I bought them.

I don't know what it is, but my guess is that it needs more light and less water.

Hi & welcome!

Crassula. Possible 'Campfire' or other similar cultivar. There are so many, ID'ing an etiolated specimen will be a guessing game.

The pic when it was new shows how the leaves were growing with no space between them on the stem. Now there is quite a bit of space between each leaf. This is etiolation, stretching from low light. If this is the spot with the most light that you have available, this may not prove to be a satisfactory plant for your space.

On the other hand, the Echeveria seems to be enjoying the spot and continues to look gorgeous and normal.

I've put the Echeveria on a windowsill where it gets much light so it has grown very big. As for my other plant, I put it in its current location because it gets a lot of light there it just happened to be a gloomy day in the picture. Its also been rainy for the past week. But indeed the plant is close together I worry about it. These are my first successful plants so I want them to stay healthy. But can anyone identify this one? My mother has had it since before I was born and its grown humongous!

The newly asked-about plant is just a bit faraway to ID but you should be able to tell "which holiday you have" by comparing to the info in this article:

http://versicolor.ca/paulsnote...

If you are still not sure, please add another, closer pic.

To get an idea of how the Crassula could look, there are many pics for comparison here, of the cultivar 'Campfire.' The specimens in more sun have no space between the leaves, and the leaves point up at the tips, with no need to curl backward to expose more surface area to light.
Crassula capitella 'Campfire'

Some plants need more light than others, to fulfill their potential. But there are many specimens of various plants out there in lower light that have quite a bit of character from doing what they can with lesser amounts. The only priorities that matter for your plant are yours.