Downloading AirSign 1.0.21 for Mac from our website was free. The software lies within Developer Tools, more precisely Distribution. This free software for Mac OS X is a product of AirSignapp.
From the developer:
AirSign lets you deliver your iOS app in a couple of minutes to your testers. The program allows you to prepare, re-sign, and deliver iOS apps in your cloud. Thanks to your Dropbox account or your S3 credentials, you can give to your testing team a QR code for over-the-air installation.
You may want to check out more software for Mac, such as SQLite Sorcerer, theWord Module Installer or AutoCasperNBI, which might be related to AirSign.