After reviewing community forums (maemo.org, XDA Developers, Talk.maemo.org), one actively maintained custom ROM for the Nokia N9 is:
Runs a modern Alpine Linux-based OS (Plasma Mobile, Phosh, Sxmo). nokia n9 custom rom link
To modify your N9, you will need specific tools and mirrors, as many official links are dead: After reviewing community forums (maemo
The swipe-to-unlock was still there, buttery smooth as ever. But now, when Elias opened the browser, it worked. The custom ROM had breathed life back into the silicon. It was a reminder that in the world of tech, nothing truly dies as long as there’s a community-maintained link and a user who refuses to upgrade. download link for a real Nokia N9 project like Maemo Leste PostmarketOS Nokia N9 starts shipping; U.S. customers out of luck - CNET The custom ROM had breathed life back into the silicon