Hardware & software:
- Audio Hijack Pro at http://www.rogueamoeba.com for $32 from Jason Snell.
- Fission at http://www.rogueamoeba.com for $32 from Jason Snell.
- Greenpois0n at http://greenpois0n.com for free from Chris Breen.
- DisplayOut at http://rpetri.ch for $2 from Chris Breen.
- Cathode at http://www.secretgeometry.com for $20 from Andy Ihnatko.
- Mailplane at http://mailplaneapp.com for $24.95 from Tanya Engst.
- ZeroBoxer at http://www.0boxer.com for free from Tanya Engst.