For superchargers, where you'd want it most, no. Superchargers use a specific protocol to communicate with the car for purposes of billing -- tied to the Tesla account associated with the car. I don't think the plug itself is different than a normal Tesla plug (other than being beefier, perhaps?) but I could be wrong.
For normal Tesla wall chargers, like one that might be installed at someone's house, I think there are adapters that might work for the Leaf, but I have no experience with them.
That said, other than Tesla, I think there is standardization. Especially with Electrify America. But, Tesla's network is so convenient and widespread that it is currently a big selling point for the brand, in my opinion.
For normal Tesla wall chargers, like one that might be installed at someone's house, I think there are adapters that might work for the Leaf, but I have no experience with them.
That said, other than Tesla, I think there is standardization. Especially with Electrify America. But, Tesla's network is so convenient and widespread that it is currently a big selling point for the brand, in my opinion.