I'm a cofounder at Poda.io a collaborative visual planning tool and we've just gone live with our launch special $19 Lifetime deal😱(Super Limited) No restriction, Try free no credit card required.
If you're planning your next product launch consider Poda.io, we put the emphasis back on outcomes with tree based roadmaps. Planning trees work really well for product techniques like OKR's, Opportunity solution trees, GIST planning and more generally mind maps.
Haven't heard of any of these techniques, but interest to find out more, here's some great resources: