You can have a look in the category ‘integrations’, as you can see there’s not a lot of cross-over on what people are asking for. We covered the major ones some time ago (e.g. PayPal, Stripe, GoCardless etc) now we’re kind of dealing with a long tail of other potential integrations.
Oh, one that has come up a couple of times is PaymentSense, and also CardSave.
EDIT
Zapier also looks interesting, this was raised by another use a week or so back. Zapier is a way to link APIs so an event on Platform A triggers an action on Platform B. We’ve been looking into this!