DRC
Design Rules Specs ( I believe you are refering layout sign-off) are usually defined by Foundries/Fabs and based on the process complexity ( which sub-micron category).
technology libraries is more on tech files which important for layer mappings, conversions, layers assigns for de factor GDSII, and so on.
Hercules, Calibre, Assura, Diva, Dracula, Tanner L-Edit, Quartz, etc... all can be sign-off tools for physical verification depends on which Vendor your company choose to collaborate with the foundries.