What are my house plants

I have a Sansevieria I don't know which variety. Also, I have had two plants given to me but don't know their names.
Can you help please. Thank you.
Davemed.

 

Hi!
Pic 1 looks like Sansevieria cylindrica.
Pic 2 - pretty!! At first I thought maybe an Echeveria, maybe E. agavoides, but the curvature and truncated leaf tips don't match the pics I was finding under that name.
Pic 3 may be a Haworthia.

 

Thanks Carolyn. Guess these plants are difficult to identify at times. thanks for the help.
Davemed.