An Alda Major Mode for Emacs
Emacs integration for PureScript's psc-ide tool.
webpaste.el can paste whole buffers or parts of buffers to several pastebin-like services and supports failover...
An Emacs major mode for MIPS assembly code
A groovy major mode, grails minor mode, and a groovy inferior mode.
GNU/Emacs mode that setup local Go playground for code snippets like play.golang.org or even better :)
A collection of Clojure refactoring functions for Emacs
Global minor mode to highlight thing under point.
Fixed and automatic balanced window layout for Emacs
Emacs support for Apple's Swift programming language.