Margaret Williams from Lakers School has produced some really great lesson starters from the question bank in her Learn your Tables authoring group (requires login). They are so fast that I got really flustered the first time I tried one, and muffed it completely. They are a great aid to getting the times tables wired in.
What I really love about them is the simplicity. I tend to be always looking for how we can add features and do cool new things with Yacapaca; Margaret has reminded me that complexity is not necessary for great learning.
Anyway, here’s a sample. Have a go yourself.
Yacapaca 