[Windows Mobile Development and Hacking General] Aegishua:
Sorry, I've got to put my vote down for Batterystatus/Homescreen UI ++. It runs extremely smooth and drains little to no battery when the screen is off and comes with simple but useful additions to the plugin itself such as the battery percentage/CPU usage at the top. In addition to that is the fact that it has all of its indicators built into the app itself so say... CPU Usage or Battery Usage could be pulled with a simple line of XML.

+1 Homescreen UI ++ (Batterystatus)

PS: I've attached an image of my setup, kekeke i love it XD. Simple but Pretty and very useful

PPS: If you want the XML for mine just like pm me or something. (BTW, where you see that "10E10:" thing... stupid thing changed my M to a 10 for some bloody reason and i haven't been bothered to fix it). I'll most likely do some work on it later on when i finish my exams off and have the time to re-align everything and possibly add more stuff XD.

As for the other listed Apps..

1. ThrottleLauncher 0.9.2.. old, never used it but ive used 0.9.5 and 0.9.5 is extremely functionable as compared to the other listed UI's. It runs smooth, uses XML which makes it customisable to a certain extent(no indicators for CPU and such... doesnt suit my needs) and looks very very very nice.

2. Mobile Shell 2.1 - Wasnt too bad, extremely smooth but it drained battery alot faster than any other UI because it constantly refreshed itself while the screen was off

3. rlToday - Not a bad application but it lacks alot of functions and next to no one does work on it nowadays accounting for the lack of skins for the today plugin..

4. UltimateLauncher - I tried the trial app and was fairly satisfied with the plugin. Fast, smooth and extremely customisable and the only thing that stopped me from purchasing the plugin was the fact that i dont own a credit card and they dont accept PAYPAL!!! >_<

5. MusicFlo - Never tried... looks extremely choppy. (Rip of Manilla2d?)

6. HTC Home - I overused that plugin XD. Great plugin for the basic user but doesnt suit the needs of an advanced user. Battery drain is minimal with HTC Home

7. iFonz - A great program... but it takes an eternity to customise it and its only a launcher... the entire program is just a replacement for the Start Menu and i wont ever go near it again.

8. XIA-Multitheme - Looks extremely good but again no one does much work on the plugin thereby resulting in next to no skins for the plugin.

9. WA3 & WAD2 - Vibrant UI's and insane amounts of customisation can be done on this plugin but the plugin tends to consume insane amounts of RAM and is unnecessary for most users.

Others (Not Listed)

10. Samsung Omnia Today Widgets? - Fun to play with... gets boring really fast... and its not very useful to be honest because the only feature it really has on top of every other UI is the fact that you can move the widgets around and its good for showing off.

11. BatteryStatus/Homescreen UI ++ - See above.

12. Manilla 2D - Manilla 2D stood up above the crowd primarily because of its extensive amount of skins and also the fact that it was extremely smooth even when you underclocked your CPU. It is also easy and doesnt consume much power thereby extending your battery life.