Can I remove applications from the Cloud that I now longer want to be associated with my Apple ID?

I have applications that have been downloaded on my iPad and iPhone via my Apple ID, but I no longer want them associated with my account. Is there a way to permentanly delete them? If so, how?

I have already deleted them from the devices.

Most of these apps are free, so I'm not worrying about having to pay for them again if I'd ever want to download them in the future (which I probably won't).

Thanks!