Starting today, the Symbian operating system has gone open source and can be downloaded for free. The Symbian Foundation says that “the transition from proprietary code to open source is the largest in software history.” More information.

Symbian, which powers most of Nokia’s phones, has been shipped in more than 330 million devices worldwide. But in the last few years, Symbian has seen more than its fair share of changes.

[via Wired]