Hardware & software:
- 850 PiDP-11 at https://obsolescence.wixsite.com/obsolescence/pidp-11 for $250 + shipping from Leo Laporte.
- Mellowtronics Streetlytron Pro (iOS) for $24.99 from Alex Lindsay.
- Lock Your Developer Account with 2-Factor Authentication at https://developer.apple.com for free (with dev account) from Rene Ritchie. Also – details at iMore.
- Brooklyn Screensaver at https://github.com for free from Andy Ihnatko.