Tired of iCal? PreMinder, which is still in Beta, makes for a potentially viable alternative.
First of all, don't worry about losing all your iCal info and events. PreMinder lets you easily import all iCal information. The application is built in a multi-windowed interface, which has always turned me off a bit, as I find it unpractical to work. Not only do you have the big calendar window, but also the reminder window at the bottom, an events window on the left and a floating mini-calendar.
PreMinder provides multiple ways of scrolling through items, from a very handy monthly slider at the top to the daily notifier on the left or the quick back and forward buttons in the Calendar window.
PreMinder lets you create your own events, alarms and reminders. These can be repeated, stretched to multiple days or weeks and moved around very easily.
The search box at the top right of the PreMinder interface makes it easy to find any piece of data in seconds.
Although still in development, PreMinder is a promising alternative to iCal with lots of flexibility and features.
