Portable emacs

Can we have a portable version of Emacs ?

Multiplatform

Portacle is a Common Lisp development environment which ships Emacs (Emacs25 as of writing) with Git, a nice theme, and obviously Common Lisp tools.

It doesn't come with the new xwidgets support (see GNU_Emacs_25).

Windows

Emacs for windows is actually portable. Just download it and look at the executable in the "bin/" directory. See also this SO answer for settings tricks.