iStat Menus version 5 was released today featuring a new design, Yosemite support and tons of new features. iStat menus is a menu bar application that gives you the ability to quickly monitor various statistics for your Mac including battery stats, network speed, processor usage, heat and so much more. The new version brings additional features such as support for compressed memory, more detailed network information, power shaming, and additional time and world clock features. Federico has an in-depth look over on MacStories.
I’ve used iStat menus in my menu bar for years and can’t imagine a Mac without it. The new version is a $9 upgrade or $16 for new users.