Notify Me!

USERS WHOSE DEVICE SUDDENLY STARTS TALKING: THIS IS A BUG IN YOUR OPERATING SYSTEM, Notify Me! DOESN'T EVEN USE VOICE OUTPUT! PLEASE READ http://goo.gl/mMZYa OR CONTACT ME TO RESOLVE THE PROBLEM!
Have you ever seen an iOS device as it displayed a notification, that the screen lights up and the notifcation is displayed on the lock screen, and thought to yourself that you want to see this happen on your Android device? Well, I did and thus createt this app - Notify Me!
Notify Me! is simple in design: You add apps of which the notifications should be displayed on the lock screen to a list, specify¹ the behavior of those notifications on the way and wait for a notification - it will be displayed as a popup in front of your lock screen.
¹No worries, the default behavior should suit most people's needs:
-Popups will only be displayed if the screen is off locked.
-Notifications will light the screen up.
-On Android 4.1+, popups of notifications that provide a bigger view will be expandable.
All of these settings can be customized! It is, for example, possible to make notifications just light up the screen, without showing a popup or to don't let notifcations light up the screen, with a popup waiting for you to manually turn the screen on, etc...
Generic aspects of popups can be customized, too. You can choose between a user interface with buttons and a user interface with a slider for interactions² with the popup. You can even set a custom screen timeout for cases when notification popups lit up your screen and you find your systemwide screen timeout to be too long for this popups.
²These interactions are possible: You can view the notification (this unlocks the screen and is effectively like tapping the actual notification in Android's notification area), dismiss the popup (unfortunately it is, as far as I know, no possible in Android to dismiss the actual notification this way) or expand popups of notifications that provide a bigger view (of course, only on Android 4.1+).
The only thing you'll have to do in any case is to enable Notify Me! as an accessibility service! Because there has been a lot of trouble with this in the test phase, Notify Me! will check on every app launch if it's accessibility service is running properly and provides you with a shortcut to the corresponding settings screen, if necessary. How often there will be a need for this depends strongly on the implementation of accessibility services in the Android build you are running! Whilst, during development, I only had to enable it once after the initial installation on my HTC Desire Z running CyanogenMod 10.1, I needed to enable, disable and re-enable it on my Sony Xperia Z (with stock Android 4.1.2) after the initial installation and need to disable and re-enable it after every reboot of the phone or update of the app - your mileage may vary! This inconvenience is, as far as I know, not my fault and either a bug or a security feature in some Android builds. If there are questions left, you should first consult the forum thread on XDA-Developers http://goo.gl/gmfHl before contacting me, as most questions have been answered before.
Notify Me! is free software, released under the GPLv3. If you would like to check out the source, you are invited to do so at http://code.google.com/p/notify-me/
Icon by XDA Junior Member taylorcoffelt.
Italian translation by Twitter user Kazur (@KazurBlog), Spanish translation by XDA Senior Member ldiomedi, Polish translation by XDA Senior Member trurl3, Chinese Translation by XDA Junior Member zxc123coke, Turkish translation by XDA Member tyler78, German and English translation by me.

Recent changes:
1.9-1.9.1
Fixed 'missing slider interface and app lock-up' bug.
1.8-1.9
(Hopefully) fixed AccessibilityService (except the speech output, that's Samsung’s thing)!
Fixed bugs (especially on ICS).
Optimized aggressive popups and orientation locking.
Re-added Spanish, Polish and Chinese translations.
Added Turkish translation.
Full changelog: http://goo.gl/W1wHj