I use maths-aids a lot: unfortunately it doesn't include good 'mixed' options for times table and related fact testing. I agree it's brilliant for the 'routine' stuff - but as irvine is looking for 'the next step' for a child with already fluent recall, I was trying to suggest something with a bit of a twist.
I'm sure there are other free resources out there - tbh, we just make and tweak our own.
dadsworksheets are another source of 'here's another way to present the standard facts' worksheets - but again, finding one multiplying multiples of 0.1, 0.01, 10, 100, 1000s, questions presented as fractions, squares / square roots etc all presented as a mix is more challenging.