The Coat of Many Pockets is a magical coat with an infinite number of sides, and thus an infinite number of pockets. When you take the coat off and turn it inside out, it transforms into a new coat, entirely different in appearance, and with a new set of empty pockets. The coat effectively functions as a bag of holding, for while it has an infinite number of pockets, and an infinite amount of storage, you will only ever feel the weight of the objects in the pockets of the coat you are currently wearing. However, the process of turning the coat inside out takes at least a few seconds, so this can be inconvenient if you decide to store items several dozen coats deep and need to retrieve them in a situation where time is of the essence.
Conspiracy Engines are pseudo-abandoned superstructures found floating out in Metaspace, usually created by someone rich and powerful in a fit of extreme egotism. They are city-sized orbital computers tasked with unraveling the vast, sinister plot that their creator is sure exists, analyzing billions of variables over thousands of years in an attempt to figure out who really pulls the strings. Thanks to the inherent biases of their creators, their conclusions are almost universally inaccurate. The result is always apophenia on a cosmic scale, enabled by processing power. Seeing patterns where there are none, self-induced schizophrenia brought on by staring at data-chaos until the static seems to resolve into leering faces. Their creators usually either die or go mad, and the structures are left derelict to drift through the existential void. Sometimes they have valuable information. Other times they have valuable treasure. They are generally quite dangerous to explore, outfitted with defenses to match the paranoia of their creators. People have built giant supercomputers in the middle of space for other reasons, but while generally more interesting, those are much rarer, and so the name sticks. Here are some famous examples: