Some code to modify mode-line to display things like in the VIM powerline (https://github.com/Lokaltog/vim-powerline)

Lisp:powerline.el was first released here on the Emacswiki by Nicolas Rougier and later improved by Chen Yuan.
https://github.com/milkypostman/powerline
I have rewritten this package and am hosting the repository on Github. My version uses many of the techniques in the original—posted here—but tries to make it easier to add new things. Please submit issues there and any of your own mode-line themes using PowerLine --DonaldCurtis
available at https://github.com/laynor/emacs-conf/blob/master/packages/sm-package-powerline.el
https://github.com/jonathanchu/emacs-powerline
Another variant based on the original powerline.
https://github.com/Dewdrops/powerline
Forked from Donald Ephraim Curtis’ version and provides better Evil integration.