Simple door catch to stop doors slamming.
I designed this little catch because I had a couple of doors that slammed closed when I opened windows for a through draft.
I've printed mine in ABS. First design has been in use for at least 4 months and is still going strong. V2 was a very slight redesign of the base plate for added strength if hit by vacuum cleaners.
Obviously this catch should not be used to keep fire safety doors open! Fire doors should remain closed whenever possible to prevent potential fires spreading.