I'm boldly nominating these as the best DIY pedals in the world (Hall of fame nomination, free sources, files and build video coming soon) : r/HotasDIY
Guitar Pedal X - GPX Blog - 9 of the Best Compact and Medium Format Schumann PLL Style Harmonizer Fuzz Pedals
DIY Workshop: Build your own Klone pedal | Guitar.com | All Things Guitar
DIY Guitar Effects Pedals & Stompboxes | Build Your Own Pedals Today | DIY Effects Pedals
Best guitar pedals to buy in 2021: 12 best unique and experimental pedals | Guitar.com | All Things Guitar
The Best DIY Guitar Pedal Kits | Pedal Haven
Guitar Pedal Board End Supports - Supports Only - DIY Pedal Board | eBay