Re: Android 2.3?
Funny enough, Windows 3.11 (and DOS 6.2.2) is still supported by Microsoft (if you have an agreement with them)... It was very popular for applications where you needed just a basic UI. I've seen it in automation systems, factory control units, point-of-sale terminals, ATMs, military weapons systems, and even Vehicle Control systems (Such as trains, aircraft, and passenger/cargo ships).
It was the perfect combination of features, customization, and size. I have an old system sitting on my desk with a customized version of Windows 3.11 burned into a bank of a PROM chips (16x 16 Mbit chips), 32 MB of Static RAM, a 10-BaseT network card, a 28.8k modem, 8 RS-232 compliant serial ports, a floppy disk controller with two drives, and a massive proprietary card (Three slots wide, and full length, has a couple of odd connectors on the back, no markings other than a hand-written serial number)