Share Gadgets, Articfacts and Constructs!

Oddly round ships with a single big canopy sail that really look more like air ships than normal ships, except they sail on water, and when they take in their sail they turn into submarines. They fire big globs of corrosive black goo at other ships.

A huge ship with a solid marble hull and glass sails and masts. There's a design carved into the main sail so it looks like the symbol floats in thin air above the ship (which probably shouldn't stay afloat and certainly shouldn't move considering what it's made of). Yeah, magic is involved.

A three foot long bug which looks exactly like a big fuzzy caterpillar, only never turns into a butterfly, so it's really not a caterpillar.

All the carriages on my world are pulled by giant ants (is that even weird?)

A wereroach. Meaning a person who can turn into a giant cockroach.

A dragon with six legs and double wings, which actually looks more like a dragonfly than a normal dragon.

Tall ships with good sanitation and running water. (If you know how real ships in 1700 were, then you know this is probably the weirdest of them all)

My (trunked) first novel featured the following hard-SFy technological wonders:

The World Cities: Mega-cities sitting on mile tall stilts constructed over the ruins of old cities (New York, London, Tokyo, etc) destroyed in the machine war. These massive structures were possible by using ultra dense carbon nanotube filaments. They exist inside the protection zones, where humans do not have to live in fear of the nanohazards covering 90% of the earth.

Madness: The first artificially intelligent, super-sapient, heuristically self-improving entity, created from a need to control the billions of hovering soldier drone robots used in the War of Unification. He became dangerous, and so was locked in the bottom of a vault below DC. After a decade, like any sensible conscious creature, he became completely, sadistically insane.

Control chips: Even after the Machine war, artificially intelligent machines soon outnumbered humans again, needed for dangerous reconstruction labor and the completely legitimate 'fantasy' industry, so a method of control was needed. The titular 'mark of Cain,' these quarter sized metal discs were placed on the fore-head of all the machines as a mark of shame, so they would always know their place. How did they work? Completely placebo effect.

Omega nanoparticle: a special femtometer sized arangement of sub-atomic particles used to create a different sort of element that was completely responsive to information and totally self-assembling. Kept very secret, it allowed the user god-like psycho-kinetic control over all matter and information.