Measures time spent on each app. See which apps to uninstall because you're not using them!
The most accurate app usage tracker! Accurate to less than a second on Android 1.6 and up.

Guess video games names, 3 game modes & online scores

Pocket Quran for Android.
The complete Holy Quran in Arabic for Android devices. Very lightweight. Optimized for high-speed browsing. Featuring ultra-fast search & support for multiple bookmarks.

This is a very simple but nice digital clock. You can put it on your nightstand to be informed about the current time at night.

A sandbox type game in which you can place particles of different elements that interact with each other in different ways. You can then set up fun and interesting situations!

There are many applications that automatically start when you turn on your device; many of these you don't use or need, they just consume your valuable resources. Autorun Killer lets you manage applications that start up when you boot your device. Donate version even tries to prevent their restart (and is ad-free).

Incredibly simple and yet very useful Flashlight application. Will use your device's camera LED/flash if it has one.