Here are a few links to some forums, helpful information sources, blogs, and a few record labels I follow.
TFR Electronics Git Repo
Forums:
DIYstompboxes
ilovefuzz
Madbean Pedals
AmpGarage
Amps & Tube Technical:
The Valve Wizard UK
Duncan's Amps
Rob Robinette
EL34 World
Ampbooks
Pedal Related Technical:
GEOFX
amzfx
Elliot Sound Products
Electrosmash
Other Electronics Technical:
Ken Shirriff's Blog
Open Source Software/Hardware:
KiCad
Record Labels:
Slovenly Recordings
In The Red Records
Goner Records