Daily Wireless has an article which points to several open source developments in the smartphone and tablet market.
Built entirely using HTML5 and other open Web standards, Firefox OS is a Linux-based open source operating system for smartphones and tablet computers. It has been demonstrated on Android smartphones and the Raspberry Pi.
At Mobile World Congress, Mozilla announced Firefox OS and has expanded its range of handset partners, bringing aboard LG and Huawei. Mozilla already had Alcatel and ZTE aboard, but the Korean smartphone maker has joined the line-up, with Huawei also committing to the OS in emerging markets.
Firefox OS is entirely open source (based on HTML5) and Mozilla is offering the software completely free to its OEM partners.
Tablet software Ubuntu Touch is being developed by Canonical. It is also based on HTML5 and will have a headstart on app development as there is an active community of Ubuntu developers in place.
For more details on which operating systems various hardware manufacturers are supporting and for when we can count with having some of these things available, check the original at Daily Wireless http://www.dailywireless.org/2013/02/27/firefox-smartphones-introduced/