Visual Task Switcher does exactly what it says on HTC EVO 4G
This isn't much more useful than just long pressing the Home button on the HTC EVO to view the last 8 apps you accessed (or the last 15 if you're using MoreRecent, which can be mapped to a long press of the Search button), but if you're coming to Android from webOS and/or you were just a fan of the whole cards thing, then ESD Mobile's Visual Task Switcher probably makes you feel all warm inside.
When launched via your choice of long pressing the Search button or tapping the Home button, a 3 x 3 grid of the running apps (complete with screenshot of the currently running task) on your EVO is displayed. Press a "card" and you're taken to the app.
Although it's more visual, the actual function is no different than tapping a regular recent apps icon. What sets it apart, however, is that you can view more running apps (swipe left/right; notice the indicator dots at the top in the screenshot) and you can long press on one to bring up the option to force stop it. Another tap is required to actually stop it.
Visual Task Switcher has a lot of potential but the execution so far falls short for me. It came out a few months ago and I've been waiting for a stellar update to come out before writing about it, but since it never did, I decided it wasn't worth the wait.
QR code below if you want it.