Brackets Extension for insertion of Special HTML Characters
The Inline editing context menu will get an additional option to bring up a menu of common Special HTML characters to insert of the cursors position (e.g. Copyright, Trademark, Non-breaking space).
A more option at the bottom of this menu brings up a dialog which has an extensive list of these characters for you to choose from.
In addition 'Alt-C' will bring up the full dialog to select a character to be inserted at the cursor position.