I have one answer: the All-in-One SEO widget on Wordpress. That might seem like a cop-out, but it does oblige to you to fill in all the relevant bits and pieces and think about keywords. However, it's a Wordpress widget. I combine it with it a word…
I must also add that I spend a lot of time reading within my target group, looking for trends, turns of phrases, buzzwords and the like. It's not the same thing as looking for inspiration as such, but it helps.