BusyCal

BusyCal screenshots

Keep track of your important events and don't miss out your deadlines.
BusyCal 3.1 : Preferences Window

Alternative downloads

Fantastical
3.3
Easily keep track of your daily events, to-dos, and reminders.
Remind Me Later
1.4.2
FREE
App that lets you add events to iCal.
NUD to iCal
1.01
FREE
A free utility that copies events from Now Up-to-Date to iCal.