In-Flight , from Aftershock Innovations: Currently available for $3, In-Flight offers real-time information on departures and arrivals anywhere in the FAA tracking region.

MolWeight , from Akkyra Systems: The $2 utility calculates the molecular weight and other key properties of peptides and oligonucleotides from their sequence.

Audio Note Taker , from Keycode Software: Version 1.1 of the $1 audio note-taking app adds Wi-Fi syncing with nearby Macs, the ability to change audio quality settings, and a new interface.