Please help: To-do list web application
I'm always impressed with how well and quickly LFers can recall or find good links on request. Here's one from my wife: she's looking for a web application that will maintain her to-do list for her. In particular, she'd love it if it could show her at glance "here's what you have to do [today/this week/this month/in 6 months]," and email her reminders when things need to be done soon.
Your help is appreciated!