I want to explore a library.

[fresh mesa]

Which ones should I explore?
I want to keep my options versatile so please suggest me a bunch of libraries for various things,

[clear lark]

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[open sparrow]

ffmpeg

[sand sparrow]

Libraries for what purpose?

[fresh mesa]

I want to keep my options diverse for now.

[sand sparrow]

It's like "what tool should I buy"

depends on what you want to create

[lament monolith]

There are a bunch of amazing libraries.
For example the Library of Congress in Washington D.C., or the State Library of Victoria in Melbourne, or the Austrian National Library

[oblique pine]

https://en.cppreference.com/w/c/links/libs

https://github.com/oz123/awesome-c

Google "c library list" if you just want a list of c libraries

But if you want specific suggestions that might be more useful to you

[tropic geyser]

unistd.h