Hardware & software:
- Tiny Hardware Firewall at http://www.tinyhardwarefirewall.com for various from Leo Laporte.
- BBEdit at https://www.barebones.com for $49.99 from Andy Ihnatko.
- PhilzCoffee at https://www.philzcoffee.com for various from Rene Ritchie.
- PhoneView at http://www.ecamm.com for $29.95 from Rene Ritchie.