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The first is Concise Encoding, a secure ad-hoc data format (think JSON, but secure, more data types, and also has a binary encoding). https://concise-encoding.org/
The spec is largely done, and I'm primarily working on the reference implementation (in golang) and portable tests (so people don't have to keep rewriting tests for every implementation), but I could use help getting other language implementations out there.
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The second one is Dogma, a BNF-style metalanguage for describing binary and text data (because there wasn't a decent one for describing binary data). https://github.com/kstenerud/dogma
Dogma is mostly there as well, but while it is primarily focused around writing technical documentation (and I have written a syntax highlighter for VS Code), there are probably a lot of other tools that could be built around this technology (which I simply don't have enough time to pursue).