Hardware & software:
- Duolingo (iOS) for free from Leo Laporte.
- Aftershokz Sportz M2 at http://www.aftershokz.com for $80 from Andy Ihnatko.
- Launch Center Pro (iPhone) for $4.99 from Rene Ritchie.
Books:
- Jim Henson: The Biography
for $21.42 (Amazon Affiliate Link) from Andy Ihnatko.