This repo contains some of the AHK scripts that I use.
arrow_keys.ahk was inspired by a blog post by @nikitonsky that argues that the cursor keys belong at the center of your keyboard. I tried the suggested approach and greatly enjoyed it, and have since added a bunch more nifty functionality to the script.
Hope some of those hotkeys are useful for you, and/or that they inspire you to create some of your own! :)