While the best, it is often found on sites like Magknight.com rather than totally free, but check their site for the latest "community" versions. Boeing 787-9 Version 0.5 Beta (X-Plane.org Forum)
: This is widely considered the best truly free 787 for XP11. It features a decent 3D cockpit and a beautiful exterior model, though it lacks complex features like tilted landing gear. You can find it on the X-Plane.org Forum Boeing 787-10 by "Airliners" : A newer addition to the X-Plane.org file library that works specifically with X-Plane 11.50+. Boeing 787 Dreamliner 1.0 (Fly Away Simulation) boeing 787 x plane 11 full free download
The Boeing 787 Dreamliner is a marvel of modern aviation, featuring composite materials, advanced avionics, and superior fuel efficiency. Bringing this experience into X-Plane 11 requires a specialized add-on that can handle its complex systems. While the best, it is often found on sites like Magknight
The freeware market for the 787 is a shadow of what the payware market offers, but the landscape is evolving: You can find it on the X-Plane