Some apps I've checked out recently... starting with some home replacements, didn't see any reviewed yet.
PandaHome
App
Free
+1
Free home replacement app! For something that's free, it's incredibly impressive. You can set a number of homescreens up to 7, I think, skin just about everything, and take screenshots of the homescreen. There are some really nice themes already available. I don't find it as easy to use as dxTop, but for free you can't go wrong.
http://www.pandaapp.com/pandahome/android/support.shtml
Sweeter Home
App
Free
+1
Free home replacement, but still in pre-beta phase, and it shows. Despite the very rough edges and lack of variety in available themes. But its approach to home replacement is by far the most radical of all the apps I have seen. Practically everything that appears on the screen (or doesn't) is completely customizable. If well supported, this could one day become the home to beat.
http://www.sweeterhome.com/
dxTop
App
$2.99
+1
Great home replacement that gives you 4 homescreens, 2 drawers (all apps with more displayed, and running apps with ability to kill), replace individual icons, auto-rotate with accelerometer, screencaps of homescreen, and fully skinnable goodness.
http://www.dxtop.com
This is the home replacement app I settled on. There is a free demo so you can get a feel for it, but it didn't take me long to decide to shell out the 3 bucks (UNINSTALL THE DEMO FIRST! I got an unfortunate demonstration of the Market refund feature by accidentally uninstalling the wrong dxTop). You get 4 homescreens, but not in the way you might think. They're arranged in a diamond- top, left, right, bottom- with no center screen. Or, an even better way to think about it: swiping a certain direction always brings you to the same screen. The little icon between the two drawers shows you which one you're currently on.
I imagine this could be kind of jarring to Android veterans used to the homescreen, as there's no logic to going "back" to the screen you were just on. But for someone new enough to completely jettison the original homescreen with no problems, it's great to have every screen one swipe away.
As you can see above you can get some pretty dramatic changes going on. And the auto-rotate solved my biggest complaint with the phone so far.
It's a powerful app. For some reason, it's much smoother and quicker on my Droid than the default homescreen. Now I've actually killed the Home "app" on my phone. There's even a skinnable iPhone style-lockscreen if you're into that kind of thing, but I really love the ability to turn off the sound from the lockscreen so easily (movie theater essential!).
Another app I didn't check out but has great reviews is
GDE. I know it lets you have multiple homescreens and has a nifty cube effect good for impressing people. dxTop was a quick and clear winner for me, though.
The rest of these are some small but very useful apps that people might like.
Screen On
App
Free
+1
This is an essential battery-saving app: install it, choose which apps you want the screen to stay on forever during, and profit. Anything you don't check will autolock as normal. Maps, the multimedia/car dock app, browser- anything you want to stay onscreen will. Just remember to
set your auto-lock duration to 30 seconds; 15 is too short for the app's checking mechanism.
MotoTorch LED
App
Free
+1
Use the LED as a flashlight on the Droid- it's actually fairly bright. Leave this running in the background and head into the video recording app to take some night video.
Layar
App
Free
+1
Extremely robust augmented reality browser. See POIs, restaurants, hotels, wikipedia entry locales, floating Space Invaders, and basically anything else you can imagine superimposed over your camera view.
ShapeWriter
App
$9.99
+1
The keyboard replacement to end all others, ShapeWriter is like the Swype technology just being unveiled on the Omnia II, except with 9 more years of development. Draw the shapes of entire words to type- marvel at the eerie accuracy and ease of correction.
http://www.youtube.com/watch?v=MeTb7nPYlOA
I downloaded this app thinking it'd just be a novelty for me since I have a hardware keyboard- indeed, if you have only a touch keypad, check this out immediately. But even for Droid users, this app is impeccable for two situations: one handed typing, and typing while the phone is in a dock (i.e., poking with your index finger). For these alone I think I'm not even gonna wait the 30 days of the trial to shell out the 10 bucks. It seems steep, but if you use the phone's keyboard every day, this and dxTop can be had for less than an extra large pizza.
Hope these are of some use!