I don't mean to be THAT PERSON but I have to be honest.
Several of these look like sprite-rips from NES/gameboy games. Let me give some details based on the (one) slanted screenshot available.
Starting from the bottom...necklace that is the upside-down 'triforce' (4th column last row) and the one next to that seem far too similar to the ones from Link to the Past and some of the Zelda gameboy games. In fact many of these seem like spritesheet rips from gameboy games in general. The familiarity is something I'm acutely aware of precisely because I'm a longstanding member of the rom hacking/modding community for emulation and retro games.
TLDR the rest:
-Bow & Arrow ripped from Link to the Past
-At least 2 of the potions sprites ripped from LttP and/or other zelda gameboy games
-The hooked staff at the bottom is a direct 1 to 1 sprite rip from Final Fantasy 1 on NES. Don't even try to deny that lol. Really obvious to nearly anyone who's ever played it.
-Speaking of staves, at least 2 to 3 of them in the same 'staff' row are ripped from LttP (again) because you use at least one of them to 'freeze' things for puzzles.
-The boots are interesting because they don't look like stuff from typical NES games; I've seen at least one or two boot sprites ripped from the game Strider for NES. I'd have to go back and do a side by side to make sure exactly which one but I know that it is one of two possibilities.
-Helmets, Axes, and Lances all look familiar though I'd have to dig and get a side by side on which game they are from. I have a good idea just from looking at them though.
Would love for the creator to show some proof of self-creation/authorship and that these aren't just ripped from other games. If they'd like me to post some side by sides then I'll dig around and do so.