I grabbed a couple. Fugg it

I can think of a couple very recent things.

-Tor just implemented a version of PoW based partly off RandomX:

https://github.com/tevador/equix/blob/master/devlog.md#dos-protection-for-onion-services-from-randomx-to-equi-x

-Monerujo wallet just released "Pocket Change" an expiremental app layer solution to get around the 20minute lock limit wen you have few TXOs:

https://www.reddit.com/r/Monerujo/comments/1412gah/update_for_the_fearless_monerujo_v337_pocket