I have used Reminderfox for years, but from time to time it stops working. I have been able to make it work again by exporting preferences, reminders, and todo's, removing it from TB, and then installing it again and importing those things, but that's very annoying, and it has happened four times within less than a year. (Just now was the most recent time, with TB 60.8.0 and RF 2.1.6.6.) So I'm looking for a GOOD alternative. This alternative should allow you to add a date and time to be reminded and allow you to access the email message from within the reminder when it pops up. One alternative people have suggested is to convert the email message to a calendar event. This works great as far as providing the reminder, but as far as I can tell it does NOT allow access to the email message the reminder is about. Reminderfox does all of those things (when it works).

It's also not clear to me that Reminderfox is still being supported. When you click on Help from within Reminderfox Options it opens a suspicious-looking page (see attached image). So does anyone know of an equivalent alternative to Reminderfox?