I've often taken the role of trip-planner amongst family and friends for the past 10 years, and it's always resulted in a jumble of emails, texts, and phone calls to get everything aligned.
Surprisingly there hasn't been a solution that allows you to easily share flight options and airbnb options in a simple link, at least that I've seen.
I've been testing PlanMoreTrips for the past couple weeks, and while still earlier on in it's development cycle, the base use case is fully functional, and their team has been taking feedback and consistently shipping new releases.
It's definitely part of my trip-planning repertoire now!