Hardware & software:
- Clozure at http://ccl.clozure.com for free from Leo Laporte.
- Haskell at https://www.haskell.org/platform/mac.html for $19.99 from Leo Laporte.
- MileIQ – Mile Tracker & Mileage Log for Tax Deduction & Business Expense Reimbursement – Mobile Data Labs Inc. (iOS) for free from Alex Lindsay.
- Aurora HDR at http://aurorahdr.com for $39.99 from Andy Ihnatko.
- Pythonista – omz:software (iOS) for $9.99 from Rene Ritchie.