OSDev.org

With ICQ shutting down I've removed that option from the profile fields on the forums.

I've updated the IRC label to Libera.chat IRC instead of FreeNode. (suggested by klange a while back)

There is now a Discord option.

Would anyone want other options like Snap, Insta, TikTok, etc?

I don't think those will be of a great appeal to this audience, but probably Matrix and SIP might be good options?

I would suggest Mastodon and Friendica, and - given that most users have their code hosted somewhere - GitHub, Gitlab and BitBucket user names.

For what it's worth, I'd find use from Matrix, Mastodon, and GitHub profile links.