Linked from
The 8 pages that link to NOT gate, each with the reason it gives.
NAND gateRelated: An AND gate followed by NOT gives the NAND operation.
OR gateRelated: Negation combines with OR in De Morgan's laws and compound circuits.
XOR gateRelated: Inverting intermediate signals helps build XOR from simpler gates.
NOR gateRelated: NOR combines OR with the inversion performed by a NOT gate.
XNOR gateRelated: XNOR can be built by inverting an XOR output.