St. Clair Software has released Default Folder X 4.6.8, adding compatibility for the public beta release of OS X 10.10 Yosemite. The update also improves the speed of the Rename command and fixes a bug when running in 10.9 Mavericks so you can use standard contextual menus instead of those provided by Default Folder X. ($34.95 new, $10 off for TidBITS members, free update, 10.6 MB, release notes, 10.6+)
Mac OS X Zip Expanding Utility
Firefox (and possibly other applications) may ask you what you want to do with .zip archives that you download from the Internet. If you want to expand them with Mac OS X (rather than StuffIt Expander), you may be unsure of which application actually does the job. You're looking for Archive Utility (in Leopard and later) or BOMArchiveHelper (in Tiger). In either case, the application is stored in Hard Drive/System/Library/Core Services/. Don't move it from there, though, or you'll confuse matters.