The deadly cute duo of Arthur and Tristan is the creation of Aiden.Builds. This inseparable pair have each other backs in a fight. The Lego MOC features an anthropomorphized sword and shield. Each equipped with a smaller version of themselves. This build uses some of those Lego printed eye tiles to great effect. The posable arms, and the mouths also helps to give these weapons some personality. This is a great use of the clear bricks, to help hold and display the characters. These two guys look ready to go on a grand adventure, while getting into some wacky hijinks.
This stout Lego Mech is called the TwinBee, and is the creation of rongYIREN. The TwinBee is an homage or recreation of the ship from the NES/SNES video game. A series that started way back in 1985 in Japan, and seems to still be going with an iOS / Android release in 2013 titled Line GoGo! TwinBee. This homage manages to keep the arms, which are essential for dropping bombs. The Lego version has some awesome jets, large enough to outrun anything else. It even manages to stand out as something unique in The Lego Mech or Robot genre: http://everydaybricks.com/category/robots-2/
One of the most aggravating things about the Lego Minifigures is their limited articulation. They seem to have a problem reaching their face, or anywhere in front of their bodies. There a a few complicated solutions for this that involve rubber bands, and/or clips. These solutions stick to official Lego parts, but can be very fragile.
Crazy Bricks has a solution called Crazy Arms. And, the good news is they just released a Kickstarter for their solution (here). They have found a way to attach their own arms with using a removable and replaceable system that is completely compatible with Lego Minifigures. To start off with they are offering two different arms. One that is posed in front of the torso, and another that is stretched out to the side. These are easily the two most appealing poses.