#Kobo is a Canadian brand of eReaders.
They're nice devices, they work with all popular DRM-free file types (including ePub, PDF, MOBI etc), and the built-in Kobo store also sells some DRM-free titles alongside DRM ones.
The official site is here:
There's an unofficial Kobo DRM-free search tool here:
There's also unofficial libre firmware you can install: