I'm new to RSD and am wondering if there are any ready-made widgets or code for accordions, modals, tabs, tooltips, dropdown menus, carousels, etc. If not, I think it would make a nice addition to this great program. Would actually complete it in a way.

There are many included in the components section (two places to look 1/ Go to The Content Tab in Design Pane 2nd tab = components .... on the top bar there is an icon = components select that and there are a load which you can add to your project