In theory you don't need them on Android.
In practice, you definitely do.
Do yourself a favor - download TasKiller Pro. Put the kill-all widgit on your home screen. Hit it whenever your phone feels sluggish - it will be IMMEDIATELY better.
I had more problems with the Task Killer apps personally. Caused all sorts of weirdness to happen. My Droid runs much better without them.
I had more problems with the Task Killer apps personally. Caused all sorts of weirdness to happen. My Droid runs much better without them.
Some of the custom ROM's have more aggressive memory management and work very very well. I haven't used a task killer in months, it works better than every. It started with gumbo's kernal and has continued on with damages 2.1 ROM.