Zero, first, second, third and mixed.
http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-24/session-2/activity-3
http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-28/session-1
http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-28/session-4
The first conditional is used to talk about possible future situations and their possible results.
http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-23/session-2/activity-3
Linking devices are used to link one idea or argument to another. A common situation is when we are talking about something that happens and its result, or a cause and its effect.
http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-10/session-2/activity-3
The second conditional is used to talk about impossible, unlikely or imaginary situations and their possible results.
http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-24/session-2/activity-3
The third conditional is used for imaginary situations in the past and their imaginary results.
http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-9/session-2/activity-3
http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-1/session-1
Zero conditional is used to talk about things which always happen in particular situations.
http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-5/session-2/activity-3