I know cyberlabs and foundry has adjacency with workshop
I know gene labs has adjacency with lab
What about others?
I know power sources and satelite uplinks have with one another.
Any others?
From the XCOM Wiki :
Generators
+2 Power for every adjacent power facility.
Uplinks
+1 satellite capacity for every two adjacent uplinks.
Research
Laboratory, Genetics Lab : +10% increase to research speed for every adjacent laboratory.
Alien Containment : none.
Engineering
Workshop, Foundry, Cybernetics Lab : +10% on resources used when building vehicles.