Seeing the other tesla valve, I was pretty certain that the same principle could be extended to 3D. I came across a more symmetric, optimized design of a tesla microvalve at senlin41.org/topology-optimization-of-tesla-type-microvalve/ and traced it.

The following is a trace of the optimized valve in openscad with added support to make it printable without overhang or flying parts. Parameters allow you to set the coarseness of the rotational extrusion ($fn=32 works fine for me), and the distance of the support bridges.

I have not printed or tested that yet, so I suggest you start with the scad file and adapt it to your needs.

This is a parametric version of an airlift valve for hydroponic and aquaponic systems like Window Farms[tm].

This model can be used as a parametric replacement to the airlift valve mentioned in the ancestry. Tube size and connection point can be configured. License is restricted to the terms of the CC-BY-SA as per the original work.

You may also consider to use T-valves as in the following example instead: our.windowfarms.org/2011/11/16/t-valve-airlift/

I discovered I have access to a 10m resolution elevation model of Norway.
So I decided to see if I can print my next paragliding spot.

The original model is 1000x1000 points at 10m resolution = 10km x 10km. The downsampled version has a 100m resolution. The cliffs are roughly 450m high.

This is a simplistic library that allows you to generate valid constructive solid geometry (CSG) hierarchies in Haskell and translate them to OpenSCAD syntax.

Currently, the library allows you to export any generated hierarchy using the show function. A nice objective would be to interface directly with OpenSCAD/CGAL methods to export directly to STL.

Get the latest version from github: github.com/relet/scad.hs

Public domain. Feel free to flattr this if you prefer creating your objects in a functional way.

A not-to-scale model of Sutro Tower, San Francisco.

Work in progress. I haven't tried to print it yet. Some tweaking may be required to get it right.

All parts should stick together via pin connectors, but glue will help. Or print it all in one piece if you are a z-extended overhang wizard.

Is it a hook that showers?
Is it a flashy hook opening its trench-coat just for you?
No!
It's yet another bathroom gear storage facility.

It's a simple thing that, you know, holds toothbreesh. It fits on the brackets that hold my mirror (and probably millions of mirrors out there).

The holders are offset, so that you can store your breesh in a way that prevents them from dripping on each other, in case that matters to your immediate surroundings.

Public domain. Feel free to flattr if this holds for you.

A parametric buckle for connecting and tensioning two flat lines. The knot shown in the picture slips in one direction only - if you apply tension to the inner of the two line ends. If the tension is equal or larger on the outer line, it is self-locking.

Not safe for any purpose, but I tensioned mine (10mm bars, solid print) up to some 5kN.

Parameters:
- Line width, bar diameter, overall length, tolerance
- Offset from center (working with thick lines requires more spacing in the center)

Feel free to flattr this if it makes loose ends meet for you.

A derivative of the above thing, further parametrized - i.e.

* you can flip the head, the legs, and both arms
* you can set a custom tolerance to allow the prints to interlock properly

Feel free to flattr this or the original design, if you support our interconnected robot overlords.

A simple, supportless bracket to grab your z platform and one of these simple screen mounted Logitech cameras by their respective necks and make them move in unison.

Public domain.

Yup, that's right. Now you can feel like you've won the Journey to the End of the Night without even trying to run.

totheendofthenight.com
journey.in-berlin.info

A simple fork, and equally simple spork which can be printed without support on a makerbot. It is nearing the quality of the forks you can get for free with your french fries, but will give you the warm fuzzy feeling of printing something on your own.

Public domain.

"Worker running to deliver a message"

Definitely not one of the best scans, but I had in mind to fix it up eventually, unless the powers that be are faster again. ;)

A relief of Lenin, scanned in 3D on location at the Memento Park in Budapest, Hungary.

Work in progress until I acquire tbuser's skills in cleaning up the mess^Wmesh.

It's a quick doodle of a multipart picture frame. You can plug pieces of frame onto the base to extend it, and to hold down the picture within.

I would probably make it (more) parametric and extendable in all dimensions, but I'll leave it WIP until I actually get around to it.
Yes, I am aware that I could just print a round Tuit myself. Thank you Thingiverse.

Public domain.

Something to put your candles in.

Public domain. :)

Print any riser/wedge you'll ever need for your skateboard or longboard.
Oldschool and newschool bolt pattern (or both).

Public domain. 3D printing is not a crime!

A wire clip for the rear left of your Thing-o-Matic. Because it's springtime and you should tidy up your workspace.

Public Domain.

A 20mm (+ intolerance) plug to cover for example those square cable shafts you have on your Makerbot. My main motivation was to keep those bits of plastic from the wipe procedure and loose nuts and tools from falling down into the hardware compartment. Plus they do look nice and tidy.

Feel free to flattr this if it saves you from turning your Makerbot over and giving it a good shake. Public domain.

A more or less parametric scad file that allows you to create hexagonal burr puzzles. In the current configuration, you can mostly enable or disable the various notches in a 12 piece setup (4 x 3 parallel bars) using a binary pattern - generating anything else requires a bit of twiddling with all kinds of parameters. But the hex bars and setup should provide a decent start.

It also shows how to intrude faces in the hexagonal directions to increase the tolerance.

An example is included how to create notched pieces. If you print the attached STL file three times, you should already be able to obtain a solvable puzzle.

Public domain, because sharing is caring. Feel free to flattr me or impress me with your puzzle creations. :)

A level 9 Burr puzzle designed by Peter Rösler, dubbed the "devilish seduction".

Quoth researchweb.watson.ibm.com/BurrPuzzles/Samples.html : This puzzle has 5 false solutions and 1 which can be taken apart. Even in all the false solutions some pieces can be moved.

A level 6.4 Burr puzzle, and as far as I can induce from the name, it's been designed by Philippe Dubois.

Public domain - feel free to flattr or datalove.me

This OpenScad module allows you to generate models for arbitrary Burr puzzle pieces.

The bit pattern used for configuration is identical with the one on the following site: research.ibm.com/BurrPuzzles/index.html

You can use the Burr calculator on this site to calculate and print your own puzzles.

Additionally, the file contains the burrx() module which allows the corner blocks on the lower level to be set. It basically extends the pattern to 4*L bits.

Public domain, because sharing is caring.
Feel free to flattr this if you like the infinite possibilities.

The above puzzle in parametric and printable form.

Feel free to flattr this or any derivatives if it finally helped you to obtain a copy. :D

Another of George Hart's playthings:

georgehart.com/puzzles/12-sticks.html

Because the world needs more chopsticks.

This is a three part print meant to produce a single continuous object, a food implement, and a simple test case for this kind of printing objects that exceed your platform extents.

Public domain, because sharing is caring.
Feel free to flattr this if you can finally eat your ramen.

Because you need a 3D printer to create anything like that.

To me, a test how to connect two very thin rods - the connector is inspired by the way a knife is attached to its handle.

Feel free to flattr this, or any derivatives, if it helps you with fighting your ramen.

These are various parts of scent or water diffusers to be put on top of a radiator.

One is a grid, to put various well smelling condiments (cloves, orange peel) on top.

The other is a small tub, to put water or scented water in.

Various kinds of legs are provided, one of which just happens to match my radiators.

It also features a module for a hexagonal grid, just because it is cute.

Feel free to flattr this or any derivatives, if it you like the smell of it.

These cookie cutters can be used to make cookies in the forms of the two logos of the Esperanto language and community.

Feel free to flattr this, or any derivatives, if you are a fan of the language. ;)

A slightly more parametric version of the above thing. I needed a quick handle for a 5.5mm bit, and this turned out to work quite well.

You can scale the bit holder and screw cap with a single parameter. To adjust the handle, you will still have to adapt a bit more to your needs. It has a few unparametric template objects to cut off the handle (for smaller build surfaces) and reshape the handle grip (to make it more comfortable). The scad file requires the stl files of the above thing.

Feel free to flattr this, the original thing, or any derivatives if it helped you like it helped me. I did.