OpenWrt/Opkg
From charlesreid1
opkg is the package manager for OpenWrt
To install software with opkg, it must be bundled in an ipk file
Info in this SO thread on how to create a package (e.g., a bundle of Python scripts): https://stackoverflow.com/questions/17369127/extracting-and-creating-ipk-files
Can also do more complicated things, like PirateBox does: https://www.disk91.com/2012/technology/systems/installation-of-a-piratebox-on-t-link-mr3040/
In the end you'll execute commands to download your ipk and then install it with opkg, like this:
wget http://piratebox.aod-rpg.de/piratebox_0.5.1_all.ipk opkg update && opkg install piratebox*