With so many apps available, what apps do you like, use etc... feel free to add GPS, fishing, and other general outdoor apps...

So far, I have found the following Android apps really good
STRELOK... large variety of reticle options and actually shows where to aim on a virtual reticle. You can also enter data for each type of round. sounds very handy for hand loaders.
If you need the technical specs for major brand ammo. The next app has a nice lost of all that data
Best of all its Free.

SHOOTING SOLUTION
Another app for figuring out bullet drop and windage. As mentioned above, a full list of major hunting ammo specs.

MIlDOT CALCULATOR
This is a very quick and simple app for figuring out distance using mil, moa or a combo of both in standard or metric. The feature I really like on this one is it will let you put in the accurate magnification for second focal plane scopes, then your current zoom. Enter the current mil dots of the target at whatever zoom you are using and it will still calculate the correct distance. Click on the word FFL in the app screen and it will change to SFP and let u enter the zoom info.

So what else are you guys using.