Both updates patch serious security vulnerabilities, and the Office 2008 update also resolves some Excel and Entourage bugs. (Free updates; the Office 2008 updater is 333 MB and the Office 2004 updater is 16 MB)

Boosts compatibility with 6 and 12-core Mac Pros and more. (Free updates, Pro: 193.01 MB, Express: 139.67 MB)

New integration with iMediaBrowser and Flickr, and new ability to link audio to specific slides. ($149 new, free update, 57.9 MB)

Resolves several minor bugs and a crash when saving preferences. ($199.99 new, free update, 13.3 MB)

Adds support for Outlook 2011 and Postbox 2, and makes other small improvements. ($30 new, free update, 7.8 MB)

Enables older MacBooks and MacBook Pros to work with newer MagSafe power adapters. (Free, 880 KB)

Smaller memory footprint, improved AppleScript support, various bug fixes. ($59.95/$99.95 new, free update, 41 MB)

Patches a serious remote exploit, in addition to adding a few enhancements. (Free updates, various sizes)

Adds support for t.co links, Posterous image uploading, and more - along with bug fixes. (Free, 2.3 MB)

Offers full Snow Leopard compatibility and support for IPv6 addresses, along with a slew of bugfixes. (Free, 880 KB)

Addresses issues including plug-in support, speech notifications, and performance problems. (Free, 6.1 MB)

Adobe's consumer video editing app makes its first appearance on the Mac. ($99 new, 1.71 GB)

Adds new features such as the Organizer for managing digital libraries; content-aware technology; layer masks; and Photomerge Style Match for replicating the looks of other photos, among other improvements. ($99 new, 2.01 GB)

Includes the graphic software's first major interface makeover in years, along with a few new features. ($34.95 new, $29.95 upgrade, 100.0 MB)

The first official release of an email client built on the Thunderbird codebase, with a look and feel inspired by classic Eudora. (Free, 21.1 MB)