Advanced Task Killer
This download is served from an external siteclose
NOTICE: This link will open a connection to a third-party site. CNET cannot ensure the security of software that is hosted on external sites.
Full user review
"No longer needed with Android if you are with 2.2+"
can see what apps are running
this is no longer needed to kill apps that are running, the newer Android roms already take care of that, even if an app is on it wont be doing anything.
If you are absolutely having problems with your battery, find an app manager, not a task killer. Something so you can find out which app is eating your battery up, instead of just killing all your apps all the time.