As you can see most of them are free, so if you want to support my work, you can buy any of the commercial ones and add a note in the payment so I can know that it's worth to keep publishing free stuff. Or at least say "Thanks" in this post or the pages at CKEditor, it's cheap and at least I'll know that someone has used successfully the plugins.
Some plugins are very simple and perform just a basic single operation, others are huge beasts that provides lots of functionality like the HTML buttons or SimpleUploads, take the time to read the linked page for each one.
Allow Save
The default "Save" plugin for CKEditor 4 is quite restrictive and it doesn't enable the button unless you're using the "replace textarea" mode AND you're in Wysiwyg mode. This plugin removes those restrictions and allows you to do whatever you want when the "save" event is fired on the editor. Remove the default "Save" plugin and use this one.Background Image for Tables and Cells
Sometimes you have to deal with a client or a project where the final user is supposed to be able to set a background image for tables or cells. You might not want to do it, but if you have to, with this plugin you'll get in those dialogs the options so that they can do whatever they wantConfiguration Helper
This plugin simplifies some configuration options in CKEditor like hiding/removing dialog fields, and it also provides a HTML5 like 'placeholder' when the editor is empty (eg: 'Type here the description of the product') that goes away as soon as the user focus the editorGoogle Maps
If you want to insert a Google Maps into your site you can use the simple embed code that they provide. That's fast and free, but other times you want the ability to provide more configuration options, to integrate it better into your site, create an image to send in an email... In those cases you should check the Google Maps plugin for CKEditor, because it provides a simple interface to control many options of the Maps without any requirement to understand the underlaying behavior.HTML Buttons
This is a very powerful plugin as it allows you to create any number of toolbar buttons or even drop down lists to insert whatever piece of HTML that you want into CKEditor or even wrap the current selection with this HTML. If you are searching for a simple way to add a button that inserts a snippet or a combo box with a list of options to insert, then grab this plugin and you'll be able to finish your work in a few minutes without the need to read any complex manual.Image Crop and Resize
This is a plugin that I've created for Uritec SL. It uses the SimpleUploads API to allow the users to perform basic editing (crop and resize to desired set of dimensions) of their pictures before they are uploaded to the server, or even to edit those images after they have been uploaded. For further details, check the ImageCrop page. This is a big productivity enhancer because it simplifies so much the process of cutting out the undesired parts of the pictures and then resize the selection to match the image sizes defined for the site, and it's God's sent gift for those users that barely understand how to use any image processing program.Images From Word
Another plugin created for Uritec SL.Whenever your users copy some content from MS Word (because it's an existing document, they prefer to create the content that way, etc...) the embedded images aren't copied along the content unless they use IE11. As not all the people enjoy being forced to use a browser, this plugin enhances the default Paste operation in CKEditor so it just ask the user for a couple of clicks to include the images into the content avoiding this way the frustration caused by the missing feature in Chrome and Firefox.Images From Server
Another plugin created for Uritec SL. Copying content from one site to another one means that the images use the references to your old server, but with this plugin all the images are copied and your content is updated to use the new URLs automatically. Now you don't depend on the other server, you can edit the images in your server, embed them in your emails, etc...Image Maps
This is a plugin built to use the ImgMap library by Adam Maschek into CKEditor. This way your users can mark the active hotspots in any image and create the standard <map> and <area> elements on them that can work on any browser without any special restriction. For further details, look at the ImageMaps page.Image Paste
Simple plugin that allows to upload to the server the images pasted from Firefox. You should use this one only as a test case to check that you can install custom plugins into your server and handle uploads, the SimpleUploads plugin covers this use case and many other things.Images Toolbar
Another plugin created for Uritec SL. With this plugin a floating toolbar will show whenever an image is selected, allowing the user to easily change the styles in anyway that you want, without cluttering the main toolbar or the restrictions imposed by the Styles dropdown.No ABP
This is a very simple plugin that it takes care only of removing the "abp" attributes that the AdBlock Plus extension for IE inserts into the content. It's only a few lines of code and it doesn't do anything special if the user isn't using IE with AdBlock Plus, so you should just install it by default as it will help to avoid garbage.Non-Breaking Space
It's laughable, but a smart guy provided a vote of 2 because the idea is old. Yes, nothing ground-breaking but at the same time it's the kind of little things that are good to have because we're used to them and CKEditor lacks: Press Ctrl+Space and you get a non-breaking space. Nothing less, nothing more.onChange
Currently you shouldn't use this plugin as is. Since the CKSource team introduced a similar functionality into the core I stopped updating it, although you might want to look at its code to fix the problems that they didn't care about despite the availability of this plugin that shows how to take care of.SimpleUploads (file and image upload options)
This plugin adds a whole set of enhancements and new features so that the users are able to upload files and images from their computer as easy as possible and it provides you as a developer with a full API to go far beyond what it's possible with the default CKEditor API or any other plugin.With this plugin you'll have the ability to paste files into CKEditor, drop them from your computer, avoid uploads of files that have the wrong extension or are too large, use APIs different than the one suggested by CKEditor, you must read the SimpleUploads page and the linked posts to get a glimpse of all the things that are possible with this plugin and the API that it provides.