Crystallization from a solution
No. Per definition you need to have at least local supersaturation. You can archive it by different means (cooling, evaporating of solvent, mixing with other solvent...) but in the end you need supersaturation. See: http://xray.chem.ufl.edu/growing%20tips.htm or http://web.mit.edu/x-ray/cystallize.html

Of course you can use techniques like sublimation but your question was about solution (btw in case of sublimation you also have supersaturation, only difference is that your solvent is gas).