There is a list by Most Recent PDF Guides and Most Recent Generators Guide.
Solo Guides
Start with the Solo Books and PDFs for Fantasy, then for more options there's the more general Guide to Solo Titles includes many fantasy genre pdfs. And the Guide to Solo Tools has emulators, dice rollers and random generators. Rand Roll has a whole section on Solo RPGs.
Fantasy - Digital Titles, and Books of Random Tables
There is a PDFs Guide for Fantasy. Or try a category below. The PDFs Guide to Fantasy Adventures and Groups has digital titles for hirelings, companions, PCs and parties
Fantasy - Generator Guides
Dungeons and Dragons
Dungeons and Dragons is covered in D&D Titles on DM's Guild and Drive Thru. And random generators in the DnD Tools Mega-Guide for everything D&D.
Dark Fantasy has Random Tables for Dark Fantasy in Titles and PDFs. And then Dark Fantasy Tools explores characters, items, creatures, atmosphere and bad things
Science Fiction and Others
- Science Fiction: PDF/Books Sci-Fi Guide has random table pdfs and books of generators plus solo titles. Science Fiction Tools including characters, spaceships, aliens, the stars, planets and plots.
- Cyberpunk: The PDF/Books Guide covers futuristic tables, rpgs and generator books. Cyberpunk Generators Guide has sections for characters, adventures, world, megacorporations, tech, mechs and martial arts.
- Post Apocalypse: Post Apocalyptic PDF/Books Guide has rpgs, tables and books from DriveThruRPG. Post Apocalypse Tools Guide contains apocalypse basics, in the ruins, horrors and those left behind.
- Solo Non-Fantasy: For non-fantasy solo start with the Futuristic, Horror & Modern Solo Titles. There is also a General Solo Titles Guide covering all things solo. The Guide to Solo Tools has emulators, dice rollers and random generators. Rand Roll has a whole section on Solo RPGs.
Other Guides
- Horror: is a broad genre, the PDF/Books Spooky Guide has solo titles, rpgs with tables and generator. Horror Tools has a modern take and gens for Halloween, vampires, ghosts, mansions, witches, zombies, werewolves and other monsters.
- Modern: PDF/Books Modern Guide covers digital titles. Modern Gens Guide covers '80s to now, with sections for modern tool, details and maps.
- Space Fantasy/Science Fantasy: PDF/Books Guide covers all sorts of digital titles, while Space Fantasy and Science Fantasy Tools covers a wide range that mixes fantasy and science fiction.