Available in: Actual Window Manager.
The Clipboard Templates clipboard extension lets you create a collection of text snippets that are required often in your daily work. Then, you can insert any such snippet into any text editing window in virtually two clicks: first - to invoke a menu with the list of snippets, second - to select the snippet required at the moment.
You can manage the collection of templates on the Clipboard - Templates panel. You can either keep them as a plain list or unite relevant templates into groups.