Print in ABS.
The 2-part version can be printed without support and is stronger.

A web cam mount with a quick release plate for a tripod.
Parametric, so adapt to your cam/tripod

Update: Added a version with a screw thread for mounting on tripods (without using the quick release mount)

Replacement for the Egg-bot part that is screwed onto the motor axis and is responsible for holding and turning the egg.

Instead of the center hole this has a little knob so it can easily turned by hand

Remix that plays the song "Ist ein Mann ins Wasser g'fallen"

Work in progress, not printed yet

This is a two-part cheat piece for phooky's and George Hart's twisted torus puzzle:
thingiverse.com/thing:3691

It's just like one of the original pieces broken into two smaller parts so you can close the ring.
There seems to be no non-cheating solution to close the ring, so I created this. :-)

Modified RichRap's excellent design to fit on a RapMan extruder mount.

Used write.scad to put text to the base of the trophy.
Edit trophy_with_text.scad to have your own text.

When doing retraction with the Ultimaker the quick connect on the extruder allows a bit of play.
This clip tries to eliminate this play.

Very similar to LawrenceJohnston shim, but this one is secured with a small zip tie and tries to grap the connector even better.

A clip to seal plastic bags.

The clip mechanism was taken from thingiverse.com/thing:9948
I designed this with OpenSCAD, using obijuan's handy vector library: thingiverse.com/thing:30014

Variation on the ring with stars. This is sized for kids and is open on the back, so it fits on most kids fingers

Variation of the star fleet ring that can be printed without support in one piece

Did not check size yet, probably needs scaling

I developed this sculpture during the Generator.x 3.0 workshop with Marius Watz at iMAL in Brussels, Belgium.

imal.org/en/activity/generatorx3

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.