1) iPhone cases
At the Apple store even a bumper is going to cost you $30. With a 3D printer, you could print a new case design every week. And there are a lot of beautiful designs out there.

2) Replacement parts
If you like to fix things, a 3D printer is magic. When a small plastic part breaks, you no longer have to throw the whole product away. This guy’s dishwasher had a broken handle, so he printed a new one.

3) Smartphone accessories
3D printers have come up with innumerable little ways to get more out of your smartphone, various stands, cord wrappers, sound amplifiers and camera attachments like this cheap and effective macro lens.

4) Camera gear
Photographers are willing to spend serious money for the right gear, and manufacturers set prices accordingly. From tripod mounts to lens cap holders, camera buffs can 3D print inexpensive accessories made to fit their kit.

5) Bicycle accessories
Cyclists are already used to tinkering to get their bike perfectly in tune. A 3D printer opens up whole new opportunities. Create clips to attach to the frame, a carrying handle, or even a whole pedal.

6) Science
From a tray for washing microscope slides to custom lens mounts, you can 3D print whatever tools you need to do science. Good for the grad student on a budget, or for family science projects. You can even print this anemometer.

7) Wallets and purses
It turns out you can make a great wallet or an interesting purse out of plastic. Like the iPhone case, this really changes the way you think about these kinds of accessories. If you are making them yourself you can experiment with designs you might not buy in the store.

8) Clocks
A cheap quartz clock movement and a little 3D printing, and you have a beautiful clock. Pick from many styles.

9) Containers
Look around your house and you’ll probably find a lot of small plastic containers. You can print those, and tailor them to their purpose, like this toothbrush holder.

10) Legos
If you are a Lego fan (and if you are reading this, you probably are), imagine printing any shape you want and just plugging it directly into the Lego universe. I guess you could even print a Lego-compatible Yoda head.

Hack Things concludes:

Obviously if you want to mass produce something there are more efficient tools than a desktop 3D printer. The same could be said about printing with ink. If you want to publish a bestselling paperback, you don’t do that at home. But no one doubts the value of an inkjet printer.

All the hype aside, for small plastic parts, when you factor in shipping and customization, a home 3D printer actually makes sense today.