On macOS, there is (was?) "Network Link Conditioner", used to be part of XCode.
Side node: It’s Xcode (lowercase c).
(Edited to put the Xcode note last.)
BTW, it's "Additional Tools for Xcode", without the final dot (sorry I couldn't resist) :-)
Regarding the missing dot for your final sentence it’s alright; the smiley can sometimes be considered a replacement for it.
As far as I remember, I never saw it this way in Spanish literature.
I’m not very well versed in Spanish typography, so I don’t know whether they do this or not in Spain :-)
I have been fascinated by typography since a long time ago, though.
If you want another weird (foreign) typography fact, I’m French and we have very strange rules in French, in particular for book titles, how to capitalize them. As an example, a book whose title would be “Les Belles Maisons bleues” would be capitalized differently than “Des belles maisons bleues.” (Nobody knows that in France; only the people interested in typography!)
It irks computer programmers, I guess, but people used to do this for aesthetic reasons for books.
I wouldn't go so far with the 'should'. The recommendation only really applies when you are typesetting a book (specifically a novel) or something like that. Text on the web is still so ugly, that isolated demands for aesthetics seem a bit misguided.