rEFIt is a boot menu and maintenance toolkit for EFI-based machines like the Intel Macs. You can use it to boot multiple operating systems easily, including triple-boot setups with Boot Camp. It also provides an easy way to enter and explore the EFI pre-boot environment.
* The Hidden SystemTag: A tag that is visible only to you: sys:hidden:<mySecretTag>
* OpenID Quicklinks: We added the three most frequently used OpenID providers as links to our sign-in page.
Collect current data from 22,000 water monitoring points in 27 countries and 1,000 air monitoring stations in 32 countries, and integrate it with historical data collected over the years