Old school hash?...

Like "bubble hash"?, This is cold water extract, the plant material is blended in ice water through a number of screens, the end product is a fragrant Brown powder.

Butane extract is fairly common, in my opinion it's the easiest method of extraction, all one would need is a length of glass piping (though other materials aside from glass can work), the piping would be filled with powdered cannabis, one end of the pipe will have filters connected to it, the other end will be modified to accept an aerosol butane can, the butane is blasted into the pipe, it becomes a liquid as it travels through the cannabis, taking cannabinoids with it, the liquid butane is collected in a dish and evaporated, what your left with is "shatter", this product still must be "purged" with heat to remove any lingering solvent, but your essentially left with a usable product as soon as the solvent evaporates.

There also propane extracts which give "wax" or "peanut-butter"

Then there are blended propane/butane extracts.

You also have alcohol extracts...

Then there's a machine called an Isomerizer, this converts CBD to THC, hash prepared in this manner is known as iso-hash...

  

Then you have "finger-hash" and scissor-hash", this is a result of trimming the plants, oils build up and solidify on the hands (gloves) and scissors, which are pooled together and smoked after a long day trimming.

rosintech reminds me of scissor hash, good stuff, very flavorful, THC is tasteless and odorless, it's the Flavonoids*, Terpenes and Terpenoids which are responsible for taste and smell as well as subtleties related to the subjective experience produced. So, pure THC May not be the ultimate goal here, leaving these other Flavonoids, Terpenes and Terpenoids present may be key to good hash.

*flavonoids that are unique to cannabis are called cannaflavins

-eg