Stickers
The latest reMarkable software adds support for the Capture Tool, which lets you copy and paste images in your documents. This makes stickers on your reMarkable feasible without any hacks or complex workarounds. A vibrant sticker sheet is included in my reMarkable planners, or free to download separately on its own.

PNG templates
Give your reMarkable notebooks a glow-up with these .png templates (downloadable image files) designed for your tablet.
These files use design elements from the finest pdf planner for e-Ink tablets, which adds various day/month/week pages, an efficient linking system, and ridiculous customizability. Free demo downloads are available if you want to check it out.
Dotted
A workhorse for structured sketching and bullet journalling. A nice middle ground between the dotted templates that ship with the reMarkable software.
Kanban portrait
Use the reMarkable's text selection and movement to turn it into a lightweight project management tool
More coming soon!
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How to install PNG templates
Unfortunately, reMarkable doesn't make it easy to get custom templates on to your device. Here's a guide to installing custom templates, but it involves using the command line and ssh. There are third party desktop applications that are a bit friendlier, but I can't vouch for them. RCU is probably the most notable example.