Have you been playtesting the One D&D rules documents from Wizards of the Coast? Try these options for inspiration!
Kobold Guide to Gamemastering - Flip eBook Pages 51-100
Creature Codex for 5th Edition (Hardcover) - Kobold Press Store
Inside Vault of Magic, you'll find a vast treasure trove of enchanted items of every imaginable use—more than 900 in all! There are plenty of armors,
Paizo Kobold Press Vault of Magic for 5e
Tales from the Shadows Dares D&D Adventurers to Tread the Twisting
Creature Codex — Stygous
Archetypes Archives - Kobold Press
One Better: Inspiration Aspirations - Kobold Press
The Mischievous Art of Monster Infighting - Kobold Press
D&D 5E - [Kobold Press] Vault of Magic Kickstarter
Dungeons & Dragons maker backs off OGL changes after fans revolt