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)

Gives the Thunderbird code base a new interface and advanced features like multiple unified inboxes, Conversation View, and Quick Reply. ($39.95 new, $19.95 upgrade, 12.0 MB)

Includes minor fixes to the 3.1 update, which added a Migration Assistant, tabbed email browsing, and more. (Free, 20.5 MB)

Fixes a problem where the extension became disabled. (Free, 59.7 KB)

Fixes a security vulnerability. (Free, 7.59 MB)

Updated versions introduce support for forthcoming DEVONthink To Go iOS app, and inclue new niceties and improvements.

Corrects a vulnerability in AFP in Mac OS X 10.6.4. (Free, 1.93 MB)

Introduces new settings to customize the behavior of iTunes 10, Apple Mail, and Safari. (Free, 1.4 MB)