Spiral Lands is 100% free.
Spiral Lands is a collection of puzzle games set in a colorful fantasy world.
The puzzles are based on Pipes, Links, Islands in the Stream (Nurikabe), and Light Up (Akari).
All the puzzles are algorithmically generated, and can be played at your own pace.
Story mode is a nice introduction to logic puzzles for beginners. Eternal offers infinite puzzles of increasing difficulty. Challenge mode lets you change puzzle settings and instantly solve them if you wish.

Funky Cam 3D - Amazing New Real-time 3D Viewer Technology For Android, iPhone, iPad and Bada

A new Moron Test brain teasing game.Just fall down like a MORON!
Downloaded DAILY by hundreds of Android users!
Enter the world of the fun Adventure of a moron test game. Take the life puzzling road with the cat & dog against the roaring goblin monster!

Crazy corns is amazing time killer game and it’s free for Android.

3D Illuminated Cubes Live Wallpaper.

Objectify. The first mobile 3D scanner for Android.

Description:
Take command of a starship and fight the Armada in this
intense action game. Upgrade your ship and develop new weapons as you hunt huge Elites. Use smooth touch controls to tightly navigate your way through an evolving maze of asteroids, creatures, and missiles in this hybrid mash-up of arcade shooter classics.

Multiplayer: supports up to two players on one device.

Planet Earth 3D
is a free animated 3D Live Wallpaper for your home screen.

3D Football World Cup Live Wallpaper.

Earth Geo Magnetic Calculator 3D

Weltraumsoldat3D is a retro first person shooter (2.5D like Wolfenstein3D) set in space. You can play the German space marine "Weltraumsoldat" who is on a mission to kill all evil aliens in an underground base. Apparently the aliens are conducting some sort of mad research.

Be Zetta Fast with this app! You can now go straight on the Activity that you need! In this version, there are avaible five shortcut. Be fast user!

SciFi 3D Tunnel Effect Live Wallpaper.

Sedition is a 3D tribute to old school 2D space shooters.
The touch based shoot/move mechanics work well on a large tablet, but are also designed so that you can play one handed on a small phone.

The idea behind sedition is simple, shoot stuff. Designed to be playable on displays from 3" to 10", using any type of touch, trackball, or keyboard, Sedition features 35 levels with five distinct alien types with evolving personalities.

Sedition is a 3D tribute to old school 2D space shooters.
The touch based shoot/move mechanics work well on a large tablet, but are also designed so that you can play one handed on a small phone.

The idea behind sedition is simple, shoot stuff. Designed to be playable on displays from 3" to 10", using any type of touch, trackball, or keyboard, Sedition features 35 levels with five distinct alien types with evolving personalities.

3D platformer action games, robo is attacking the evil planets. It is a shooting games and also jumping games. Upgrade robo's weapon to win challenging stages with various enemies and maps. Aim and shoot the enemies, jump to the moving bridge and don't fall down.

For high end devices only.

3D Sparkle Cubes Animation Live Wallpaper.

Laser Show Live Wallpaper.

3D Android Assembling Live Wallpaper.

Solar System Explorer will take you on an interactive 3D trip through our solar system. Featuring more than 35 planets, moons, asteroids and space probes that have visited them, you'll have a chance to see a different side of our little piece of the galaxy!