One of the key features missing from phones like the Nokia e90 and other Series 60 3rd devices is the ability to schedule SMS messages for delivery at a later point in time.
SMS Scheduler is designed to change all that, and is ideal for anyone who likes to plan in advance. It's great for being able to set up birthday greetings, reminders to your friends and notifcations of your holidays well in advance.
Using the app is a pretty simple affair. After activating the program, you just need to enter the message, choosing 'Schedule New Message' from the drop-down menu. If you wish, you can add more contacts you wish to receive the message, which I reckon would be ideal for sending a Christmas message to all your friends and family at that time of year.
You can set the program to auto-start or auto-hide, and it will run in the background without you having to worry about it. You can also view your message history, so you know exactly what's been scheduled. Be warned that several users have reported a slow-down in accessing their contacts with SMS Scheduler running, but this is generally only if you have loads of entries in your contacts book.
If you're yearning for the ability to schedule messages on your S60 then this program obliges with minimal hassle.