Labyrinth Lord. I'm sure most of you are familiar with it, it's basically a re-imaging of B/X Dungeons & Dragons rules. Add in the Advanced Edition Characters supplement (1st Edition AD&D) and you can run the D&D game of your flavor from the late 70's to the mid 80's.
The free versions are the "Art Free Editions" - nothing is missing but the art. You can buy the version with art to support Goblinoid Games if you would like (currently one sale for Christmas in July), but as I said, except for the art, its the same text.
If you use the Fantasy Grounds 2 Virtual table Top, there is a free LL plug in for it. The Advanced Edition Characters isn't directly supported, but there shouldn't be an issue if you wanted to use those rules instead.
Definitely an excellent choice of D&D flavored rules.
Power Armoured Paint: DIY Redemptor Dreadnought Base - Welcome back to the Vault! It's been a while since I've written about Warhammer 40,000 but fear not as the hobby butterfly has alighted upon my backlog of ...
2 minutes ago