I find it odd that not one book from En Publishing has been listed so far. The Fantastic Science is worth its weight in gold (and is dirt cheap as a POD).
And the same for Ronin Arts. There are scores of good pdfs on e23.
Primal Urge's Emerging Forms line is the best collection of races in pdf format.
Octavirate has several monster pdfs that are good to great, but the real gem is Feared and Hated- how to customize sorcerers.
Genjitsu doesn't have many products, but Metablades does martial/supernatural classes well and Shaping the Self is my favorite d20 product period. It is racial classes and similar ways of altering characters (mutations that aren't mutations).
Distant Horizons has more than The Practical Enchanter (which is awesome). Eclipse and Paths of Power I are both free and very useful. Paths II expands the idea of path magic (ie learning related spells rather than willy-nilly) and has ~200 spells to showcase the idea.
And the same for Ronin Arts. There are scores of good pdfs on e23.
Primal Urge's Emerging Forms line is the best collection of races in pdf format.
Octavirate has several monster pdfs that are good to great, but the real gem is Feared and Hated- how to customize sorcerers.
Genjitsu doesn't have many products, but Metablades does martial/supernatural classes well and Shaping the Self is my favorite d20 product period. It is racial classes and similar ways of altering characters (mutations that aren't mutations).
Distant Horizons has more than The Practical Enchanter (which is awesome). Eclipse and Paths of Power I are both free and very useful. Paths II expands the idea of path magic (ie learning related spells rather than willy-nilly) and has ~200 spells to showcase the idea.