My Cocoa key bindings (in addition to defaults).

DefaultKeyBinding.dict

{
    /* Additional Emacs bindings:
     *
     * "<key combination>" = "functionName:";
     *
     * Key Modifiers:
     *   ^: ctrl
     *   ~: option
     *   $: shift
     *   @: command
     *
     * Install to ~/Library/KeyBindings/DefaultKeyBinding.dict
     *
     * Functions:
     * https://developer.apple.com/documentation/appkit/nsstandardkeybindingresponding
     */


    "^l"  = "centerSelectionInVisibleArea:";
    "^/"  = "undo:";
    "^ "  = "setMark:";

    "~f" = "moveWordForward:";
    "~b" = "moveWordBackward:";
    "~<" = "moveToBeginningOfDocument:";
    "~>" = "moveToEndOfDocument:";
    "~v" = "pageUp:";
    "~d" = "deleteWordForward:";
    "^w" = "deleteWordBackward:";
    "~/" = "complete:";
    "~t" = "transposeWords:";

    "^x" = {
        "h"  = "selectAll:";
        "k"  = "performClose:";
        "^f" = "openDocument:";
        "^x" = "swapWithMark:";
        "^m" = "selectToMark:";
        "^s" = "saveDocument:";
        "^w" = "saveDocumentAs:";
    };
}