The Wine project isn't the only free software project with official releases being few and far between
, but the Haiku Project is in a similar boat. Development on Haiku, the open-source reincarnation of BeOS, started back in 2001 but the first alpha release was only released last year. This month, however, the second alpha release of the Haiku OS has arrived.
Haiku Alpha 2 delivers on increased POSIX compliance, better performance, message signal interrupts (MSIs), the Bash 4.x command line shell, ACPI is now enabled by default, a native WebKit web-browser has been introduced (named WebPositive), WiFi support with WEP encryption capabilities, improved USB mass storage performance, and a new locale kit that allows for localization/translation support.
The release announcement for Haiku Alpha 2 can be read at Haiku-OS.org