Solution for Polish characters mapping in Atom editor.

keymap.cson

# ----------------------------------------------------------------------
# Solution for Polish characters mapping in Atom editor.
# ----------------------------------------------------------------------
# Just add lines below in you Atom keymap.cson 
# On Windows: File - Keymap... 
# On Linux: Edit - Keymap...
# Licence: WTFPL
# ----------------------------------------------------------------------

# Polish 'ż' character
'atom-workspace atom-text-editor:not([mini])':
  'ctrl-alt-z': 'unset!'

# Polish 'ć' character
'.platform-win32 atom-workspace, .platform-linux atom-workspace':
  'ctrl-alt-c': 'unset!'

# Polish 'ó' character
'body':
  'ctrl-alt-o': 'unset!'

# Polish 'ą' character
'.platform-win32, .platform-linux':
  'ctrl-alt-a': 'unset!'

'.platform-win32 atom-text-editor, .platform-linux atom-text-editor':
  'ctrl-alt-a': 'unset!'

# Polish 'ń' character
'atom-workspace':
  'ctrl-alt-n': 'unset!'

# Polish 'ś' character
'.platform-win32 .find-and-replace, .platform-linux .find-and-replace':
  'ctrl-alt-s': 'unset!'