Homebrew... The only Homebrew I know about is http://brew.sh/

1) There is almost definitely an emacs equivalent for iOS

2) Pycharm- Maybe Textastic (https://itunes.apple.com/us/app/textastic-code-editor-for/id...) or Codemate (https://itunes.apple.com/us/app/codemate-syntax-highlighter/...). I'm not an IDE guy (I use Sublime Text), so YMMV.

3) OK so I get it, you're a Python dev. Admittedly, iOS is lacking in doing native app dev (in fact, I just posted something of that nature to this very thread).

4) Java, etc... I wonder if https://c9.io/ would work...

5) MS Office- Haven't used in years, anyway. I use Google Docs for all that.

6) Adobe stuff- Well, iPad Pro has some version of photoshop, I believe... PDF's are rendered natively in iOS (and quite nicely, actually... just like on OS X)... Illustrator?