3D Pens As a Complement For 3D Printers

There are several 3D Pens that use the same ABS plastic as 3D Printers.
It seems a great idea using them as a complement, to customize your 3D printed objects maybe.

As far as I know there are:


The 3Doodler
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3mm ABS pen
The original one!
http://the3doodler.com/


3D Wand
--------
1.75mm ABS pen
An imitation, not as good, but I got one!
http://www.3Dwand.co.uk


LIX
----
The most comfortable and smallest one!!
http://lixpen.com/


( The modified S