[teddyh]

Is there a downloadable dump available, in case I or anyone else don’t want to reveal exactly what symbols we’re typing into our (possibly confidential) documents?

[ivansavz]

You can run the app on localhost (see github link in sibling comment).

Here is also another useful reference for LaTeX symbols: http://tug.ctan.org/info/symbols/comprehensive/symbols-lette...

[gervase]

It seems so: https://github.com/lunaroyster/LaTeX-search