Love theese kinds of questions. Alternatives for small things like that is what make some sites unique. I'm thinking about using emojis instead of icons. That would be... something.
Interesting 😄 I'm thinking something like:
🐦 - twitter
👨🏽💻 - github
💼 - linkedin
...right? 😅 Of course having the names show on hover or something...
It would be a bit harder for some users to get it but it's a really fun idea.
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