by Mobile Stream
EasyTether shares Internet connection from your smartphone with your computer, tablet and router.
It supports USB tethering for Windows, Mac OS X, Linux or FreeBSD computers, Android 5.0 / 4.0.3+ tablets and OpenWRT-based routers.
It supports Bluetooth tethering for Windows computers and Android...
Works well, config sometimes confusing — I needed this app while travelling by car. I was able to install no problem. The confusing part is how to configure the Droid to make it work. You have to enable debug mode, which is not a problem per se. However I only use the app infrequently, so I never remember where to find that...