LadyTimer is a service for women that allows them track their ovulation and period dates. LadyTimer comes in 3 flavors. The first is a free text message service that text messages you reminders before your dates. The second is a calendar that can be used online with no text messages. The third option is a $5 program that works with all BlackBerry models and can be downloaded at the links below. There is a limited trail and I would advise you to take advantage of it since they seem to skimp on a description of what the application actually does. Since this is not something I know much about I will leave it at that =)
LadyTimer
Website: http://ladytimer.com
OTA Trial Link: http://ladytimer.com/soft/bb/
Purchase Link: http://ladytimer.com/buy.html
Thanks to MiBlackBerry for the tip
