You could have downloaded piTime 1.1 for Mac from our software library for free. The software is included in Productivity Tools. The actual developer of this free software for Mac is piDog Software.
From the developer:
piTime is a simple crontab editor for Mac OS X. Schedule applications, files and applescripts to open at a given time daily, weekly, or on a specific date. Crontab is a Unix scheduling program. piTime insulates normal users from the confusing syntax needed to configure the crontab.
You may want to check out more software for Mac, such as Address Book Scrubber, Quote of the Day or Opera Clock, which might be similar to piTime.