Nemine contradicente (nem. con.) - With no one speaking in opposition. Unanimously
Nemine dissentiente (nem. diss.) - With no one disagreeing
Nemo ante mortem beatus - Nobody is blessed before his death. We never know what is future preparing for us!

Nemo autem regere potest nisi qui et regi

Moreover, there is no one who can rule unless he can be ruled. (Seneca)

Nemo dat quod non habet - No one gives what he does not have
Nemo gratis mendax - No man lies freely. A person with no reason to lie is telling the truth
Nemo hic adest illius nominis - There is no one here by that name
Nemo liber est qui corpori servit - No one is free who is a slave to his body
Nemo malus felix - No bad man is lucky. (Juvenal)
Nemo me impune lacessit - No one provokes me with impunity. (motto of the Kings of Scotland)