Dropbear

Overview

Dropbear is a Linksys WRT54GL wifi router running OpenWrt. The hardware is pretty slow (200 MHz processor) and the on-board storage is dozens of megabytes, so it's pretty limited in terms of baked-in capabilities. There is also no USB port, etc. These shortcomings can all be overcome through hardware hacking - soldering an external USB port to the board inside, for example, to use external USB storage - but I did not need these modifications for my purposes.

Plus, Widy is the same cost, easier, battery-powered, pocket-sized, and takes USB. What's not to like about Widy?