Is it okay to use them and if so, do you know where they can be found?
Well, I con’t post the link here, but if you search for “find icons” or “icon finder”
You’ll probably get some commercially free ones there.
I mean, you can find commercially free ones there.
$H|^ I’m getting flagged huh?
A lot of the sites provide official logos for you to use, for example – https://twitter.com/about/resources/logos
Didn’t know that but it says here: “Don’t create your own buttons or marks using our logos.” and all the way at the bottom “Please do not use the Twitter marks in your avatar or business icon.”