Melo Audio are making useful gear for recording and control, either for iOS or computer based systems. We took a look at the MIDI Commander, a footswitch, audio and MIDI interface combined - designed for guitarists, but equally useful for other setups.
There's also a Foostwitch only version (minus audio interface) both have external switch/expression pedals inputs too.
These will be available shortly,
We also had a look at the Lolly digital 360degree mic for iOS, which can fix the stereo image and give you a spatially enhanced recording input.