
: Re: Are there any free open-source custom firmwares for e-ink devices? I'm curious if there are custom firmwares for e-ink devices similar to what Rockbox (website, wikipedia) is for digital audio
It depends on specific device and its architecture.
Those that are built on top of Android, typically tend to get AOSP ports, e.g. Nook (here's Simple Touch instructions), or Kindles - the latter even has CyanogenMod ROM.
Sony PRST 1 was hacked to expose full underlying rooted Android but I'm not sure if AOSP based ROM is available for it - this might be it.
I'm not sure if there are any non-Android-based mainstream eInk readers - most of the ones I heard of (which is not a lot) seem to be Android under the covers and thus can be opened up (e.g. see Kobe Glo).
Free books android app tbrJar TBR JAR Read Free books online gutenberg
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