Rebuilt based on CloudMaker's version (which is based on the sculpture LOVE by Robert Indiana).

Now the letters slightly overlap, making the print less fragile.

Done with OpenSCAD. The single letters are in a dxf and then extruded, so you easily can do some finetuning if you want to.

Tried a laser-cut version of the fantastic Gear O'Clock.
I added a display for the minutes for the design.

It's more or less complete, I just did not get it to work yet. The clock work I tried was not able to drive the clock. Need to try a different one.

A printable iPhone4 case.
Got all the measurements from thingiverse.com/thing:7156 by thingiverse.com/robyward
The backside is based on some Maya design. It can easily exchnaged by some other design by replacing a dxf that is used in the OpenSCAD file.

It's more a proof-of-concept I made for a friend (I don't even have an iPhone ;-)) The PLA print broke quite fast.

Wanted to try out Kicad and I did that by designing a blinking Christmas tree PCB. It has 24 LEDs controlled by a ATTiny2313.

This is work in progress, no firmware yet.
I probably won't be able to finish this for this year's Christmas, so if you want to give it a try, go ahead!

Unprintable? I don't think so!
I cleaned up mifga's model and printed it upside-down! It's hard to print, it get's easily knocked over while printing, but it's doable!

A bit late, but now I also have a contribution to the gangsta meme on thingiverse :-)

"Frabjous" is a scupture originally created by Georg Hart. It's made of 30 identical S-shaped pieces.

Original by George W. Hart
georgehart.com/sculpture/frabjous.html
Remade by Evil Mad Scientist Laboratories
evilmadscientist.com/article.php/frabjous

There are already another two here on thingiverse:
thingiverse.com/thing:724 by vrogy
thingiverse.com/thing:5449 by virginia

My version is a bit different. It's designed to be cut from wood and has self-interlocking pieces. No glue required!

More photos at my blog post:
blog.gagalabs.com/laser-cut-frabjous

Shower head holder for wall mount (the original was for clipping onto a rail).

Shower head holder that can be clipped onto a rail.

There's also a variant for wall mount: thingiverse.com/thing:10407

A laser cuttable ocarina.
I took ranjit's great design and added tiny bridges which hold the small mouth piece part in place while gluing it. The bridges then can be cut away with a sharp knife afterwards

Small funny design to cut on a laser cutter

Little vertical wind mill. Can be mounted e.g. on a motor axis and fixed using a screw. STL is for a 2mm axis and M4 screw + nut, but that can be changed in the OpenSCAD script.

A while ago the handle of my tin opener broke. I designed a replacement part for it.
I uploaded the OpenSCAD script, which is parametrized, so it's easy to change the axis diameter or the handle size.

Played a bit around with the original design. Made it a lot thinner and the blades "sharper".
Because it is so thin now, the used magnet does not fit it in any more (I'll just glue it instead). Changed the OpenSCAD script to toggle on/off the magnet (default is off now).
For a change my version now has 5 blades.

I adapted stickoutrock's Crosslink Ellipse Gears to be printable on a 3D printer. It's similar to natetrue's version ( thingiverse.com/thing:1538 ), but I created a completely new design in OpenSCAD, which uses a different type of joint, which should be more robust. The joints also do not stick out of the holes in the ellipse gear, avoiding the gears to get stuck during the rotation.

Here is a video of this thing: vimeo.com/18244936

Example on how to create 3D things from a Windows font.

OpenSCAD script that translates letters into 3D geometry representing the corresponding Braille letters.

Very simple thing, but still useful.
Small OpenSCAD script for a washer/spacer. You can specify inner and outer radius and thickness.

I have upgraded my RapMan with a heated print-bed and needed a modified z switch holder. I tried Laszlo's one, it works, but I had problems with it. It is attached to one of the 3 screws the print bed is hold by. These 3 screws are equipped with a spring mechanism, allowing the print bed to back down if the print head by error tries to go down below the print bed surface.
When attaching Laszlo's z switch holder, this spring has no effect any more. Laszlo says he doesn't have the problem and I think the reason is that I have a RapMan version 3.1 while he has a previous version. My RapMan z stage platform has threaded holes for the 3 screws I was talking about which seem to be the reason for problem.

Anyway, I designed a different solution, where the z switch is not attached to the print-bed but to the z stage platform instead. This also makes fine-tuning the print-bed/extruder distance easier. You can do that with the 3 screws now and you get direct feedback about the new distance. Before you had to turn the distance screw at the print head and run a home sequence to get the new adjusted distance.
With this new mechanism the z switch is not pressed directly, but there is a arm which presses it. The arm reaches up where the distance regulation screw comes down during the home sequence.

Some photos are on my blog:
blog.gagalabs.com/modified-z-switch-for-the-rapman-3dprinting

Puzzle where you have to put 7 pieces together to form a cube.

I made this together with my 9 year old son. Well, actually he made it, I only helped a bit with the OpenSCAD syntax. He also showed me that the puzzle is really solvable, I didn't manage to solve it on the first couple of tries...

Not really meant to be a functional design, just played around with OpenSCAD's rotate extrude function. But makes a nice demo object.
Based on one of OpenSCAD's example files.

Inspired by TeamTeamUSA I modeled my own version of the World Cup Trophy. I printed one for the Germany game tonight. I just need to buy some gold paint now.

This is an adapter that lets you attach a Philips ToUCam web cam (model PCVC740K) circuit board to a telescope eye-piece opening, allowing to use the web cam to directly "see" through the telescope.

Photos of the thing are here:
blog.gagalabs.com/finally-printed-the-telescope-webcam-adapter

Update 25-May-2010: Removed enforcement ring to have the sensor closer to the telescope

3d printable model of a Tie Interceptor from Star Wars

Modeled in Blender 2.5 alpha.

Updates:
v6: Scaled the model up a bit, the wings where too thin for skeinforge
v5: Fixed stl, contained some invalid geometry.