Any WP form plugins that work well with MailPoet?

Hi! I use several forms on my website where people can register for events, workshops and the like. Naturally I would love if I could put in a checkbox where people can subscribe to a MailPoet list. Is there a good form plugin for WP that works with MailPoet? Alternatively, if there is no good solution for MailPoet, are there any form plugin/Newsletter services combinations for WP you would recommend? I want to stick with MailPoet so I hope there’s something around that works :).