This site would display the same sort of information as All Trails: descriptions, pictures, waypoints, information about trail dangers, trail maps, time to complete the trail, distance, elevation gain, hiking season, etc.
I apologize if this is not the right community for this post. If there is a more appropriate community, please let me know, and I will repost this there.
Sounds like you want All Trails? But for free
Of course, few things in life are truly free – presumably, such a service would be run by donations, and the community.