zepto is based on Haskell. Currently, you will have to build from source, but if you have GHC/cabal already installed, that should not be a problem. If you have not, you will have to install the Haskell platform first.
If you have done so, run
cabal install in your terminal and zepto is ready.
There is a vim plugin that provides zepto-specific syntax-highlighting to vim.
Emacs is up next.
Zepto (c) 2015 Veit Heller