Dyson Sphere Blueprints - tiny factorio style 4x4 belt balancer
Balancer mechanics - Factorio Wiki
Alt-F4 #27 - Designing the Unnecessary
factorio balance belts
Factorio balancer guide Blueprint, compendium and more details
Factorio Workshop - Building A Better Factory :: N to N Belt / Lane Balancers - YouTube
Image result for factorio belt balancer | Blueprints, Command, Belt
5 to 3 - Belt Balancers - FactorioBin
My take on a lane balancer, and a 2-belt overflow balancer. These could probably be optimized, but they have proven useful (although a bit unconventional) - Lemmy.World
Raynquist's Balancers Fall 2020 Organized - Factorio blueprints