These are custom created/modified firmwares and loaders for your favourite slot-2 flash carts. Please note that these are generally unsupported by the flash cart manufacturer(s) so you should use them at your own risk.
I may try the new ram site, and download more RAM to my Switch. Not sure if ddr3 is the right ram
for it tho. Edit- no it uses floppy Ram, just like @AncientBoi