An application that features in every Mac nerds toolbox is BBEdit and it's now back in the Mac App Store. BBEdit is an application for text editing, writing code and much more, the return was speculated when Apple revamped the Mac App Store last year.
Many are unaware the shortly after Apple removed the App Store from iTunes it released a special version of iTunes that retained the App Store, primarily for "certain business partners". However, if you are currently making use of this special version of iTunes you may want to hold off upgrading to Mojave as it is currently incompatible with the most recent macOS release. There is no information, at present, as to if or when this version of iTunes will be made compatible.
During the Gather Round Apple Event yesterday (12th September 2018) it was announced that macOS Mojave will be released on 24th September 2018.