Launchy is a free and open-source application launcher for Windows, Mac OS X, FreeBSD and Linux.

[1][2][3] Launchy automatically loads on boot and waits for the user to call it by pressing Alt + Space or a custom hotkey.

Launchy automatically searches its list of programs for the closest match as the user types.

When it finds the desired program, the user hits Enter and it is automatically launched.

[4] Launchy can add folders and file formats to its catalog for indexing, so it can launch almost anything on a computer, including programs, URLs (also from bookmarks) and documents; as well as run Google, Wikipedia, MSN and Yahoo searches, bringing the results up in the default browser.