Windows/Mac/Linux: Launchy, the little application launcher that could, has introduced a Mac version with its latest beta. Bug fixes, performance overhauls, and new shortcuts and controls are also baked into this beta for every system.
As the developers themselves note, "Not much else has changed" in terms of appearance or basic function for Launchy, but, then again, not a whole not necessarily needs to. Many have noted that with Windows 7's surprisingly powerful Start menu searching, Launchy has a need to differentiate itself and find other functions to justify the use of a dedicated application launcher. By improving the ease of skin creation, stabilising the build, and improving performance, the Launchy team is hopefully clearing the way for strong plugins and functionality — not that Launchy can't already do quite a bit of heavy lifting.
Launchy is a free download for Windows, Linux (x86 and 64-bit), and, as of this release, Mac OS X. Lifehacker East lacks a testing Mac, so if you give it a go on your system, do tell us how it's running in the comments.
SourceForge.net: Topic: Launchy 2.5 Beta 2 (now for OS X too!) [Launchy Forums via @asian_angel]