Better features? Umm, no. Sorry. Try again.

I have set up a "tickler file" system, a la GTD in ideaMatrix. It was a bit tedious to set up, but I have a drawer named Tickler and 31 folders in that drawer, each with a number for the day of the month. If I have something that needs to be taken care of or referenced on a specific date, I create a note for in that folder. At the end of the day, I grab the current day's folder and drag it to the bottom of the drawer.

With the ability to inject e-mails and other files into ideaMatrix and todoMatrix, this makes it easy to keep track of items fairly easily.

If these two apps supported nested folders, you could create a true GTD tickler file with day folders inside month folders. But you can make it work as is.