Hardware & software:
- Upscayl at https://github.com for free from Andy Ihnatko.
- Sonnet Echo Express SEL Thunderbolt 3-to-PCIe Expansion Chassis (1 low profile slot) at for $349.99 (on Amazon) from Alex Lindsay.
- Knotwords at https://playknotwords.com for free (with in-app purchase options) from Jason Snell.
- DiffusionBee at https://diffusionbee.com for free from Leo Laporte.
- Hit the Island (iOS) at https://apps.apple.com for free from The Chatroom.