The first one looks like Corpuscularia lehmanni. The thirsty look is a dead give-away. It likes regular drinks and will let you know. The stems can colour up to a very nice pink.

Conny,

Your first picture is a Corpuscularia lehmannii, a type of mesemb. Expect typical daisy-like yellow flowers. It will plump up nicely after a long drink.

Thank you both, that's one I hadn't heard of before!

Typical though eh, 99% of succulents I buy at the nurseries are soaken wet, yet this looked like it hadn't seen water for a long, long time. Glad I rescued it!

I find C. lehmani to be surprisingly thirsty, it is always the first to wrinkle on my windowsill. But a very tough and undemanding plant...

Mine is very unhappy in my community pot which I keep rather dry in winter (you were right, Rina, I did not have a good combination). I will take it apart as soon as they start growing again. This poor thing will get more water once it is by itself.