It's Magit! A Git Porcelain inside Emacs.

Project Interaction Library for Emacs

Emacs incremental completion and selection narrowing framework

A template system for Emacs

A modern list library for Emacs

web template editing mode for emacs

Improved JavaScript editing mode for GNU Emacs

Elixir Tooling Integration Into Emacs

Gruvbox is a retro groove color scheme for Emacs. Port of the Vim version.

Code navigation, documentation lookup and completion for Ruby

Emacs Major Mode for CoffeeScript

An Emacs frontend to The Silver Searcher

Browse Dash docsets inside emacs

The silver searcher with helm interface

The emacs major mode for editing files in the YAML data serialization format.

Minor modes to highlight indentation guides in emacs.

Emacs major mode for Elixir

Emacs Rails mode based on projectile

An enhanced ruby-mode for Emacs that uses Ripper in ruby 1.9+ to highlight and indent the source code

Emacs mode for SCSS files (http://sass-lang.com)

A chimeric fork of js2-mode and js-mode

Emacs Got Git. This is a clone of Marius's excellent magit. Egg is an emacs interface to git.

Minor Mode for editing rhtml file in Emacs (does not use MuMaMo)

Emacs flymake-mode for golang

Emacs mode for Sass

A Hyperminimal UI Theme for Emacs

Pry support within Emacs

Ruby auto-completion for Emacs

grab bag of tools