This plugin will add an inline editable widget to insert placeholder that work with autocompletion.

You have to pass the available token list (the list of key that autocompletion will match) inside condig option like this:

var tokenList = {
    'animals.cats.persian': {
        value: '27392032932'
    },
    'animals.cats.korat': {
        value: '51432132312'
    },
    'animals.cats.ragdoll': {
        value: '51212325242'
    },
    'animals.cats.bengal': {
        value: '8732523235'
    },
    'animals.dogs.corgi': {
        value: '241264343'
    },
    'animals.dogs.beagle': {
        value: '24212415156'
    },
    'animals.dogs.collie': {
        value: '64542124252'
    },
    'animals.birds.parrot': {
        value: '6112261235'
    },
    'animals.birds.pigeon': {
        value: '63243151224'
    },
    'animals.bears.grizzly': {
        value: '47328329832'
    },
    'animals.bears.brown': {
        value: '434838933'
    }
};


var editor = CKEDITOR.replace( 'editor' , {
    extraPlugins: 'divarea,autoplaceholder',
    autoplaceholder: {
        tokenList: tokenList,
        defaultText: 'Add Value'
    }
});

editor.on('autoplaceholderTokenMatched', function(e) {
    var $element = e.data.$element;
    var tokenData = e.data.tokenData;
    $element.attr('rel', '{' + tokenData.value + '}');
});

Like in the example, you can separate key values with dot to provide a guided suggestion on different steps.
In the example if you type inside the placeholder "anim" it will suggest just "animals". Then when you choose the "animals" option it will suggest "dogs, cats, and birds" and so on.

Customize default text

You can specify an optional the optional configuration property "defaultText" that will substitute the default value that will appear inside the widget.

Emitted events

When a token is matched by the autocomplation an event "autoplaceholderTokenMatched" in the editor is fired and will receive inside the data property of the event object the tokenData with everything you set in your custom list.

This plugin handles the table row and column resizing process on editor.

Image Uploader Plugin
An open source plugin for CKEditor to upload images saved on your local machine. Now you can easily use this upload plugin avoiding the hassle of creating your own image uploader plugin and also it's totally free:).

How to install?

•  Click on download button, rename the folder to simage and add the entire simage folder into CKEditor plugins folder.
• You can use this plugin with CKEditor. You need to configure the end point where you want to store the images uploaded using this plugin. Add it in your config.js as follows:

CKEDITOR.config.extraPlugins: 'simage'  //to enable to plugin

CKEDITOR.config.imageUploadURL: <INSERT URL>

CKEDITOR.config.dataParser: func(data)

•  The dataParser attribute expects a function with a parameter in which you should pass the data returned by the endpoint that you have configured (imageUploadURL) . This function is expected to return a url. This url will be set to the src attribute of image html element.
• Example response by imageUploadURL endpoint

{

  url: 'imageUrl'

}

• You can also use srcset attribute to display the image based on resolution of the display.  This is optional, in case you don't specify srcset attribute in config.js, it will pick up the image from src which is set by the return value of dataParser function. srcset attribute should be configured to be a function which returns the expected string that you want to set in srcsethtml attribute. Response returned by the endpoint that you have configured is passed to this function as an argument. Add the following statement in config.js to enable srcset:

config.srcSet: func(data)

• You can listen to preventFormSubmit event to do anything while the image is uploading. 
• For example, this can be a hook to display a wait icon while the image is uploading. 
• Similarly, you can use the event enableFormSubmit to perform any action after image has successfully uploaded or the image upload failed. For example, you can remove the wait icon at this point.