https://discord.com/branding
https://discord.com/assets/2d20a45d79110dc5bf947137e9d99b66.svg
https://github.com/logos
https://github-media-downloads.s3.amazonaws.com/GitHub-Mark.zip
Converted Adobe Illustrator vector mark to SVG using Inkscape, extracted Small for 16px-120px mark, resized, and realigned the viewbox.
https://about.twitter.com/en/who-we-are/brand-toolkit
https://about.twitter.com/content/dam/about-twitter/en/brand-toolkit/downloads/twitter-logo-01282021.zip