Peak Design Black Friday sale: 20% off bags, $60 off Carbon Fiber Travel Tripod ($35 off aluminum), 20% off all bag organizers, 10% off all camera straps & clips.
Tamron Black Friday deals for F-mount.
Discounted Zeiss lenses for Nikon F-mount.
Irix Black Friday deals (deals change every two days).
Sigma Black Friday deals for Nikon F-mount.
Adobe Black Friday deals: all CreativeCloud apps for individuals are up to 25% off, for students up to 70% off (first-time team purchasers only).
Nikon Black Friday deals: Adorama | B&H (still not sure if Nikon will introduce anything better next week).