High-quality systemless books [+]

[aramis erak]

The old Lejenta titles are excellent, but are really for D&D and T&T, rather than properly systemless, but are low on mechanics.

Talislanta, while a game system and a setting, is low on mechanics, and rich on short blurb descriptions... 45 years, and still no elves, but 20 "elf in all but looks" species... Boon: PDFs legit free. Also note: the Big Blue Book, just like the big blue Champions book, can stop a hunting rifle's bullet. Some yahoo on youtube demonstrated that for both.

 

[Wofano Wotanto]

I would call Lejentia truly system agnostic myself, at least outside of the Stanza pack.

Mentioning them reminds me that there's also the "Catalyst" City Book series from FBI, which (unlike Lejentia) is still available. I didn't see them mentioned as yet, surprisingly.