Sarah Martinez shares an overview of this coveted 2 page per day planner by Midori
Bullet Journal
Bullet Journaling is a system of creating a fully customized planner for yourself in a blank notebook (dotted is most popular)
Roterfaden
This explains how the system works: Roterfaden sells its own inserts but the great thing about this system is you can fit any notebook in the corresponding size into the cover. They have A5, B6, and A6.
The Double Schedule planners are a collection of B6 planners that each feature a monthly layout and one alternative layout, so you have two views for each month. There isn’t a ton of content in English that I could find about these planners, but I purchased the Progression version from Yoseka on recommendation from Amy. It features a 30-day Gantt chart layout, which is nice for project and team capacity planning.
Wonderland 222
Plotter & Filofax
Plotter makes quality leather ring binders with very small rings in sizes that can take inserts from other companies, including Filofax
ScientistPlans goes through everything that comes with an original Filofax
Happy Planner
Happy Planner is a disc bound system that enables a high level of customization. I will confess I don’t watch many videos about this so I don’t know what the best explanation for the system is yet, will hunt for one (and welcome suggestions! Find me on IG at @gemcha0s). But the community is large and there is tons of content out there.
Erin Condren
Erin Condren planners are spiral bound and chunky like Happy Planners, I also have limited knowledge about these.