Hardware & software:
- Cine Meter (iPhone) for $4.99 from Alex Lindsay.
- SoundBender 2.0 Easy-Fit Magnetic Sound Enhancer for iPad 2 & iPad 3 (No Wires or Power Source) Non Retail Packaging – Black
for $19.99 (Amazon Affiliate Link) from Andy Ihnatko.
- App.net at http://app.net for free from Rene Richie.