Package list at http://bin.entware.net/armv7sf-k3.2/ and https://toltec-dev.org/stable/. Personally for me Syncthing is the most important thing I've running there to quickly sync files. After all we're talking about a ePub/PDF reader not an Android tablet.

Even thought it won't ever be an android tablet with hundreds of applications, I like the fact that they actually don't make you go through the nine circles of hell in order to SSH as root, compile code and install stuff on a device you bought. They don't also include spyware like Google does. :)

Here a few link that you might find useful:

• https://stachu.net/hacking-the-remarkable-eink-tablet/
• https://github.com/reHackable/awesome-reMarkable
• https://github.com/danielebruneo/remarkable2-hacks