It's been quite a while since I've used a structured running plan. The last time I used one it was the runners world Smart Coach tool which allowed you to put in a recent race time, your next race date, your desired level of training (easy, medium, hard) and your total amount of miles per week you want.

I used this tool to train for a half-marathon and it worked great....but I'm seeing it has now been discontinued. Is there anything else like that available now?