So myself, and a few other event planners, recently created a free app to make our event planning easier. It allows you to easily manage guest lists, roles, assignments, and track responses/surveys. We wanted to reach out to our colleagues in the event planning community to see if it could be of service to anyone else.
The app is called Eventene and is available at https://eventene.com
Shoot me an email at firstname.lastname@example.org if you have any questions.