Ian Baird at Skorpiostech has been hard at work polishing up Changes, the new OS X directory comparison and file differencing utility, for a 1.0 release. We covered the beta at the end of last year and the program received a significant amount of feedback from testers in the months following, producing a high-power app that makes managing the differences between files and folders a breeze.

Changes is Leopard-only and leverages Core Animation and Quick Look for a refined user experience. If you're a FileMerge user, you'll probably find the power and ease-of-use of Changes to be a welcome step forward. And it fits into just about any workflow with a CLI utility, a TextMate bundle, BBEdit menu scripts, TextWrangler menu scripts, XCode integration and F-Script support, in addition to Subversion, CVS, Mercurial, git, Perforce and other SCM systems. And its support for MacFUSE mounted volumes is ready for prime time.

Ian also tells us he's looking for a clever tagline for Changes (think BBEdit's "It doesn't suck"). He's given TUAW 2 free licenses to award to the best contributors, so take a stab at it in the comments! And for those less inclined to witty prose, Ian's offering $10 off of the $39.95 price tag (25%) with the coupon code TUAW, which is valid for the next 2 weeks.

You can get a fully-functional, 15-day trial and licenses are available for purchase starting today.

This one is ostensibly for developers, but if you ever rock a revision control system or get excited about a little late-night diff-and-merge for whatever reason, your life may have just gotten easier. Changes is an app designed to simplify project synchronization and differencing for groups or individuals working locally or remotely. It provides a GUI and an impressive list of features for an initial release, including MacFuse support, Subversion and other SCM integration, a TextMate bundle and a command line utility.

Yes, it bears a resemblance to FileMerge, but Changes offers features and options well beyond Apple's aging utility. Because it uses existing systems (chdiff) and provides a plugin SDK, it's both easy to implement and extensible. The command line utility and F-Script support provide additional options for incorporating Changes into your existing workflow. I appreciated the familiar interface and was impressed by how simple it was to integrate Changes into my existing TextMate/Subversion workflow with a few keystrokes.

Changes, which is a Leopard-only release, is currently in beta and is available for immediate download. As of today, the download requires registering for a beta key but the developer has let us know that an upcoming build will switch to a simple time-locked beta. If you dig the software you can get a pre-release discount on a full license, receiving $10 off the $39.95 release price, but the offer is only good until the end of the beta period. And, less importantly, I made it through the whole post without a Bowie reference. Phew.

Update: The new build mentioned above has been released and no longer requires registering for a beta key. An email address is still required for download, but it's less hassle now.