Unless you're a total know-it-all, there are bound to be things that you don't recognize.
If that's the case, just head over to r/whatisthisthing and harness the hivemind of Reddit. They'll help you out.
Here's something that doesn't really have a name. Its purpose, if it has one, is to allow cleaners to more easily access areas without having to use a ladder.
This is, in fact a pry bar. It's a heavy-duty variant known as a Johnson bar, and can lift things like safes.
This is a curette, a tool that medics would have used to scrape away tissue from injured areas of the body.
This purpose-built device is sometimes known as a 'fly swatter' and it's designed for tamping out fires when water isn't available.
This simple tool is likely a net weight: something small and heavy that could be attached to a fishing net to help it sink.
These things are literally sheets of rubber. They're the raw materials that are shipped out from a rubber plantation.
With a little help, the original poster was eventually able to open this. Apparently, it's an old-fashioned lighter.
This is a nifty device that can never go obsolete. It's a perpetual calendar, which can tell you what day a certain date falls on for any year.
This is a relic from the era where people needed a utensil for everything. It's a spoon specifically designed to ladle out mint jelly.
Here's a relatively simple one: this kind of highly-specific area is known as an inglenook, a word that translates to "fire nook."
This looks like a tiny rock climbing wall, but it's actually known as a bee hotel, or a Slovenian bee house. Yes, bees live there.
This is more of an illusion than an actual trail: the water disturbed by the boat hasn't coalesced with the surrounding water yet, and the sun's rays are just highlighting the difference.
This is made of obsidian, and its purpose is simple: it's most likely a paperweight. Tchotchkes like this were popular in the mid-20th century.
This is an electric hot water bath, double boiler, or chafing dish. Really, the possibilities here are endless.
This is called a dibble board, and its spikes are designed to make a series of small holes for planting seeds in trays.
This is a Hindu ritual box, but it's missing a piece or two. It would be used to store turmeric and other colorful powders.
His backpack looks like something a Ghostbuster might wear, but it's actually a device meant to jam drone signals and cause the drone to crash.
His ring is a simple counting device and he's likely using it to count his silent prayers throughout the day.
This eerie green glow comes from an ultraviolet sterilization lamp. The green color comes from the part of the light that's within a visible spectrum.
This odd device with a knob-looking attachment is a hydraulic ram, a pumping device that uses the water's flow to power itself.