Syncthing - No introduction needed. Couldn’t live without it.
Healthchecks.io (you can self host this) - Dead man’s switch monitoring for all my automation. Most of my automated scripts hit up a Healthchecks endpoint when they run, and if they fail to hit the endpoint on a regular schedule I get notified. Mandatory for my anxiety.
I feel piracy for demo purposes is fully justified if you buy it after you like it. People always say vote with your wallet but it’s more like gambling with your wallet if you don’t get to see and touch the product before you make the purchase. Giving proper demos should be more common with digital media.