Here at Fehu Games there are certain OSR RPG game systems we use the most when I present and talk about gaming. Recently at a small presentation, I realized it might be helpful for new players to have a list of links to some of the systems as we move through various introductions.
In no particular order here are The OSR RPG Game Systems We Use:
Swords & Wizardry light also by Frog God Games – All Download files are here
Dungeons & Dragons starter Set (5E) – by Wizards of the Coast – Their free download page
All the links above are official link to publishers who are freely sharing their game content.
There are many fantasy Role playing games, but these are the ones used and referred to the most by Fehu Games as myself (Lloyd Metcalf).