DING! 1.05 for Mac can be downloaded from our website for free. This free Mac application was originally designed by Southwest Airlines. DING! for Mac is included in System Tools.
From the developer:
DING! is a specially designed tool that brings live updates of southwest.com offers directly to your desktop, allowing you to get a jump on the latest southwest.com sales. In addition, the DING! application provides quick and easy access to popular southwest.com Travel Tools like Online Checkin and Flight Status! Using DING! can help you save time and money.
You may want to check out more Mac applications, such as MacDING, DingTalk or Rock in Code, which might be similar to DING!.