Comment by zamadatix

I think the one that made the biggest news cycle splash this last month was the FastRender experiment https://github.com/wilsonzlin/fastrender from Cursor, but I've also seen some others posted this last month. Simonw's blog seems to be tracking some under the browser-challenge tag https://simonwillison.net/tags/browser-challenge/ such as one-agent-one-browser and HiWave.