Whisper & Venom is a comprehensive OSR adventure and regional setting for character levels 3-5. It was written using the Labyrinth Lord rules but was designed to be as portable to other OSR rules systems as possible.
The interactive version was completely redesigned to take advantage of the strengths of digital publishing. Layers, chaptering, comprehensive linking and interactive buttons that give immediate access to relevant table and maps are on every page.
8 or so hours left as I type this.