Most of the blob emojis we use come from the Blob Emoji Community. They are licensed under the Apache License 2.0, and are inspired by Google's Noto Emojis. Here are the ones we are currently using:
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These two blob emojis were made by @shiro, licensed under CC-BY-NC-SA-4.0: ​ ​

Finally, these two blob emojis were made by @kuro, also licensed under CC-BY-NC-SA-4.0: ​

Most of the LGBT+ flags and symbols are Mutant Standard Emojis, which are licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. We currently use:
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The sparkling pride hearts were made by Kat, licensed under CC0 (free distribution). We currently use:
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The other queer emojis were made by Zoë. They're all licensed under CC0, and you can find some of them in their QueerCats project. We currently use:
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All of the signs we use are Mutant Standard Emojis, which are licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. We currently use:
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The raccoon emojis were made by Claire, based on the Google blob emojis. We currently use:
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All Marvel emojis were created by @ikol. They're licensed under CC-BY-NC-SA-4.0. We currently have:
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We have added the following emojos to our roster, but even after asking around multiple times we do not know who made them, so we assume they're sort of in the public domain.
If you can give us any clue towards any of them, we'd greatly appreciate it!

The emojos are:
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The Sushi Cats emojis were made by @kkcake and are free to use as emojis. We currently use:
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