For the Atom Editor, using Proto REPL and vim-mode-plus together. This allows you to use `,` as a leader instead of `ctrl-alt-,`. Very simplistic.

keymap.cson

'atom-text-editor.vim-mode-plus.normal-mode':
  ', l':	'proto-repl:toggle'
  ', L':	'proto-repl:toggle'
  ', y':	'proto-repl:remote-nrepl-connection'
  ', j':	'proto-repl:start-self-hosted-repl'
  ', e':	'proto-repl:exit-repl'
  ', k':  'proto-repl:clear-repl'
  ', S':	'proto-repl:toggle-auto-scroll'
  ', b':	'proto-repl:execute-block'
  ', B':	'proto-repl:execute-top-block'
  ', f':	'proto-repl:load-current-file'
  ', r':	'proto-repl:refresh-namespaces'
  ', R':	'proto-repl:super-refresh-namespaces'
  ', p':	'proto-repl:pretty-print'
  ', x':	'proto-repl:run-tests-in-namespace'
  ', t':	'proto-repl:run-test-under-cursor'
  ', a':	'proto-repl:run-all-tests'
  ', d':	'proto-repl:print-var-documentation'
  ', c':	'proto-repl:print-var-code'
  ', o':  'proto-repl:open-file-containing-var'	# Opens the code of the var or namespace under the cursor. This works even with vars defined in libraries.
  ', n':  'proto-repl:list-ns-vars'	# Lists the vars in the namespace under the cursor.
  ', N':  'proto-repl:list-ns-vars-with-docs'	# Lists the vars in the namespace under the cursor with documentation.
  ', I':  'proto-repl:insert-save-value-call'	# Inserts a call to proto/save with a unique id
  ', D':  'proto-repl:display-saved-values' #	Displays values saved using the proto/save function.
  ', C':  'proto-repl:clear-saved-values'	# Clears previously saved values using the proto/save function.

'atom-text-editor.vim-mode-plus.visual-mode':
  ', s':	'proto-repl:execute-selected-text'