GlobalSign is currently running a discount on Adobe AIR code signing certificates, selling one-year certificates for $99.
If your applications are publicly available, you should be using a CA-issued certificate, such as one from GlobalSign, VeriSign, or Thawte. This price is a discount of $130, making this a good time to make the switch. See Code Signing in Adobe AIR for more on why this matters, and Switching Certificates for information on how to transition from your current certificate to a new one.
For those who are wondering, no, I’m not receiving anything from GlobalSign for posting this.