This very useful question (community wiki) list-of-freely-available-physics-books is
collecting a list of freely available resources that we find out there.
How to make it more organized, without transfer the work to some specific individual ?
If it is community wiki, then just actively encourage everyone to edit it -- make sure the post itself prominently says "please edit me to make me better!"
We also support anonymous peer reviewed edits as well:
If we are really going to make a list of all the free physics books out there, including things like readable sets of lecture notes, it will get unwieldy. We might want to start separate threads for separate areas of physics and link them to each other.