The HP TouchPad is one of the most iconic tablets. It was initially released in 2011 with webOS, a mobile operating system that, in retrospect, was ahead of its time with features like gesture navigation. Just over a month after the TouchPad's release, HP announced that they would be ending support for all webOS devices, so the tablet substantially dropped in value. The tablet, which retailed at a starting price of $499, famously went on sale for as low as $99. Enthusiasts quickly swept up the remaining stock of the TouchPad, and developers began work on porting Android 2.3 Gingerbread to the device. Newer Android ports have been developed for the aging tablet, and now Android 9 Pie is the latest Android version to run on the device.

HP TouchPad XDA Forum

An Android 9 Pie AOSP-based custom ROM for the HP TouchPad is now available on the XDA forums. XDA Senior Member elginsk8r created a thread for the Evervolv ROM just a couple of days ago. Although Bluetooth and the camera don't work yet, the fact that Android Pie is running on a nearly 8-year-old device is certainly impressive. If you have the tablet sitting in a drawer somewhere, this might be a good time to bring it back from the dead.

Download Evervolv (Android Pie-based) from the XDA Forums