Cathay Photo, TK Photo ...
TK Photo's version may have Nikon brand on them, OEM by Lenspen for Nikon.
My favorite cleaner, easiest and fastest to use ... will run out, but it's ok.
Since all my lenses that can accept filters have a UV filter for protecting the lens' front optics from dust and fingerprints, I only clean the filter, so I use the Lenspen Filter Klear the most. Normal Lenspen for used lenses that I buy before putting on the UV filter, and it's also nice to have the screen cleaner for once in a while use.
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