Little tarlets look lovely, either savory with say cherry tomato and feta or sweet with some fresh fruit (you can set them with gelatine or put some custard on the top then cool them to set).
I had some great canapes at a do once, mini fish and chips, a few small chips and a little bit of battered fish in a mini newspaper wrap.
You could do kebabs with oven roasted veg like peppers, courgettes, onion and tomato (vine ones the best).
You've already got one of my favourites, honey and mustard sausages.