Melpa

MELPA (Milkypostman's ELPA or Milkypostman's Experimental Lisp Package Archive) - MELPA is a growing collection of package.el-compatible Emacs Lisp packages built automatically on our server from the upstream source code using simple recipes. (Think of it as a server-side version of el-get, or even homebrew.)

It is a version control based package repository for Emacs 24, that is, if you have your package in a version control system, just create a simple recipe for MELPA, and it will automatically fetch the package from your published VCS.