subject: Most Popular Smartphones [print this page] The open source culture has penetrated the smart phone market in a way. There have been attempts to open source both hardware and software of a smart phone. Most notable project from open hardware development is most likely the Neo Free Runner smart phone developed by Openmoko. Lately, the Google Android OS is a popular open source mobile operating system. Nokia has an initiative around Symbian too, which has open-sourced all Symbian smart phone code in February 2010.