company-mode - Modular in-buffer completion framework for Emacs.
CIDER - Clojure Interactive Development Environment that Rocks for Emacs.
Lispy - Short and sweet LISP editing.
Eglot - Client for Language Server Protocol servers.
use-package - Macro allows you to isolate package configuration in your .emacs file .
org-journal - Simple org-mode based journaling mode.
dumb-jump - Emacs "jump to definition" package for 40+ languages.
which-key - Emacs package that displays available keybindings in popup.
reformatter.el - Define commands which run reformatters on the current Emacs buffer.
elm-mode - Elm mode for emacs.
inf-clojure - Basic interaction with a Clojure subprocess.