This is a case for a USB stick/USB drive. The original (a 4gb PNY attache mini) case was ugly and poorly made, so I printed a replacement.

Notice how my name is written on the side of the case. Unlike other manufacturing technologies, the cost of a 3D-printed object increases logarithmically with complexity. This creates interesting possibilities for embedding information within physical objects (in this case, the name of the owner of the USB stick).

This is a device that allows your Makerbot (or other cnc machine) to draw/print/cut on cylindrical or spherical objects, in the manner of the EMS EggBot (http://egg-bot.com/). It works by connecting one of the machine's axises to a stepper motor, which then turns the workpiece.
The workpiece is held between two centers (several designs included) which are supported by two brackets: one holds the stepper motor, and the other holds a 608 bearing. The brackets are mounted on a dovetail way, which allows them to be positioned on the base, to accommodate different workpieces. After positioning, the brackets are clamped in place.

This is a small two-wheeled robot designed for pattywac's bearing contest. It is similar to other robots available on thingiverse, but it is unique in that it does not use gearmotors or continuous rotation servos, but plain dc motors and a makerbot-printed geartrain.

Although the printed geartrain is incredibly noisy and not terribly efficient, it is much cheaper than any gearbox that one could buy. Also, it's printed on the makerbot, which is pretty neat.

Features:
-Makerbot Printable Geartrain (8:1 reduction)
-Printable without heated build platform
-3mm holes in chassis and cover for easy modification/expansion
-Can accommodate motors up to 25mm in diameter (comes set for 22mm in diameter) and up to 30mm long.

This is a spacer for the MK4/MK3 extruder. It prevents the bolts on the bottom of the z-stage from colliding with the bolts on the build platform.

This is a makerbot-printable dremel based milling machine, and my entry for the make/makerbot contest. I wasn't able to finish printing it before the deadline, so it is untested, and should be regarded as a prototype. After I finish printing, I will release a revised version that will fix any bugs that come up.

The axises move on dovetail slides. When completed, it will have a travel of 11cm on the x axis, 5cm on the y axis, and 10cm on the z axis.

So far, I have printed half of the x axis and part of the y axis. The dovetail slide moves freely with little slack or wobble, even though the print warped. This makes the rest of the machine look very feasible, and I'm confident that it will be able to machine aluminum (shallow cuts, of course) when it's finished.

This thing holds test objects for the skeinforge configuration tutorial taking shape on the makerbot wiki.
wiki.makerbot.com/configuring-skeinforge

This is a PostScript program to generate optical encoder wheels (suitable for printing out on a transparency). Unlike similar programs, it is highly flexible and has many features, such as:
-Correct inside and outside diameters, regardless of line width.
-Quadrature capabilities, with adjustable phase difference.
-Automatic scaling of text size.
-Optional index track, with adjustable size or automatic fitting to segment size.
-Automatic page filling with cutting allowances.
-Most features can be turned on or off.

This part holds a 608 bearing for easy mounting.

This is a knob for a desk lamp, but it could work with other things as well. I've included a version with and without a hole, so you can make it fit any size of shaft.

It is 5 cm in diameter and 2cm thick. The hole is 1cm deep and 6 mm wide.

This is a toothpick for a standard size swiss army knife.
I'm not able to print it, so I'm not sure if the curve on the top part matches the curve of the knife casing. If you make one I would be grateful if you post a close up picture of the toothpick in the knife.

It is 5 cm long.

The gcode was generated using the ReplicatorG skeinforge default settings.

Update July 12 2009:
Changed name so it would be accurate after being truncated.

A simple flower pot with a drainage hole.

The default dimensions are 5.6 cm top diameter and 5 cm tall, but you can scale it to whatever you want.

The gcode was produced using the default ReplicatorG skeinforge settings.

Update Aug 28 2009:
Fixed up mesh in blender.

Update Aug 27 2009:
I've found that Tower seems to cause problems when generating gcode with skeinforge.
If you have problems, try turning Tower off.

Update July 10 2009:
Increased the wall thickness from 2 mm to 3 mm.