- Cider — The Clojure Interactive Development Environment that Rocks for Emacs https://github.com/clojure-emacs/cider
- Tide - TypeScript Interactive Development Environment for Emacs https://github.com/ananthakumaran/tide
- Indium — A JavaScript development environment for Emacs https://github.com/NicolasPetton/Indium
- Request.el – Easy HTTP request for Emacs Lisp http://tkf.github.io/emacs-request/
- dash.el — A modern list API for Emacs. No 'cl required. https://github.com/magnars/dash.el/blob/master/README.md
- The Emacs Package Developer’s Handbook / Packaging https://github.com/alphapapa/emacs-package-dev-handbook#packaging
- Learn Emacs Lisp while customizing Emacs http://emacslife.com/emacs-lisp-tutorial.html
- Emacs Lisp Guide https://github.com/chrisdone/elisp-guide
- Truecolor and Italic support and terminal https://github.com/syl20bnr/spacemacs/wiki/Terminal
- Sentinels: Detecting Process Status Changes https://www.gnu.org/software/emacs/manual/html_node/elisp/Sentinels.html
- Creating and Deleting Buffer-Local Bindings https://www.gnu.org/software/emacs/manual/html_node/elisp/Creating-Buffer_002dLocal.html
- Company Mode - Writing backends https://github.com/company-mode/company-mode/wiki/Writing-backends
- Company Mode - Writing backends II http://sixty-north.com/blog/writing-the-simplest-emacs-company-mode-backend.html
- Elisp: Interactive Form http://ergoemacs.org/emacs/elisp_interactive_form.html
- Elisp: Using thing-at-point http://ergoemacs.org/emacs/elisp_thing-at-point.html
- The Emacs Package Developer’s Handbook https://github.com/alphapapa/emacs-package-dev-handbook
- The Emacs Lisp Style Guide https://github.com/bbatsov/emacs-lisp-style-guide
- Take Your Emacs to the Next Level by Writing Custom Packages https://spin.atomicobject.com/2016/05/27/write-emacs-package/
- Writing company mode backends https://github.com/company-mode/company-mode/wiki/Writing-backends