Tim del Chiaro has created a landing page with a list of Embarcadero Technology Partners that are among the first to update their tools and components to support RAD Studio XE6, Delphi XE6 and/or C++Builder XE6 at launch time. You can find the list at http://edn.embarcadero.com/article/43761. These are just some of the many partners who plan to support XE6 as soon as possible.
Technology Partner Tools and Components included in RAD Studio
RAD Studio XE6 includes special editions of popular tools and components from Embarcadero Technology Partners at no extra cost - enabling you to do more than ever before. Bundled tools vary by edition. See feature matrix for further details.