Calendar application

What calendar application do you use? Do you use something like Sunbird or iCal (if you're on a Mac, anyway), or do you just use the built-in calendar in another applation like Outlook?

For awhile now, I've sought a good calendar application for Windows, but I never seem to find one I like. Sunbird seems too empty, like it's missing something. (This is hard to explain...) Outlook is... not my favorite thing in the world. Once, I thought I had found something great in Chandler, but I realized that it is a serious resource hog. (80MB of RAM used before the interface has even loaded, way to go!)
For the time being, though, I use Sunbird, mainly because it works. I'm interested in finding something better, though.

Jam it back in, in the dark.

Originally Posted by BlueMikey

This probably isn't something you are looking for, but I use Excel to keep track of everything I need to. I usually dislike most calendar programs, they are either missing key things I want or are way too bloated, so I'd rather just manage everything myself.

I might try this, as it seems easier to be able to type in whatever I feel like (and in whatever format).
Thanks for the suggestion.

There's nowhere I can't reach.