CKWEditor does not offer support for customizing the tools, it would require editing the CKEditor source code.
as for the spell checker, see pm
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.