Nokia N9 Custom Rom Link ✓

This is the most famous custom ROM for the N9. It allows you to dual-boot Android alongside MeeGo. The final versions were based on Android 4.x (ICS/Jellybean).

Battery drain, slow performance compared to modern devices. nokia n9 custom rom link

Sailfish OS is the commercial continuation of MeeGo, developed by Jolla. It is well known for its gesture-based interface. While Jolla never officially ported it to the N9, the community did. This is the most famous custom ROM for the N9

Use the flasher tool to flash the new kernel that allows dual-booting. nokia n9 custom rom link

: Community guides like those on dt.iki.fi describe how to install old versions of Sailfish OS alongside Harmattan.