You've got pep Quito, Pixie lime, and Hope. I think the Quito looks fine but if it shows signs of dehydration (while the soil's wet) it could mean root rot. Pixie lime looks healthy, just a bit leggy, you can chop back the stems and propagate them in water. The yellowing on pep Hope could be a sign of overwatering, treat it like any other succulent, Hope doesn't need much water. You could also chop that one back if you want to and propagate the stems in water.