The open-source keyboard launcher Quicksilver has been updated to version β69, a maintenance update with a plethora of fixes that also adds support for OS X 10.8 Mountain Lion. The release now enables Quicksilver’s “paste” action and internal shortcuts to work for all keyboard layouts, makes Automator actions universal, and fixes sporadic opening and closing of the Quick Look panel. It also allows the app’s preferences to be localized and adds French localization. (Free, 3.3 MB, release notes)
Mac OS X Services in Snow Leopard
Mac OS X Services let one application supply its powers to another; for example, a Grab service helps TextEdit paste a screenshot into a document. Most users either don't know that Services exist, because they're in an obscure hierarchical menu (ApplicationName > Services), or they mostly don't use them because there are so many of them.
Snow Leopard makes it easier for the uninitiated to utilize this feature; only services appropriate to the current context appear. And in addition to the hierarchical menu, services are discoverable as custom contextual menu items - Control-click in a TextEdit document to access the Grab service, for instance.
In addition, the revamped Keyboard preference pane lets you manage services for the first time ever. You can enable and disable them, and even change their keyboard shortcuts.