Listary is a revolutionary search utility for Windows that makes finding your files and launching applications blazing fast, for casual and power users alike!.
Alfred is a productivity application for macOS, which boosts your efficiency with hotkeys, keywords and text expansion. Search your Mac and the web, and control your Mac using custom actions with the Powerpack.
RocketDock is a Mac OS X dock clone. It provides a nice clean interface to drop shortcuts on for easy access and organization. With each item completely customizable there is no end to what you can add and launch from the dock.Discontinued
The program is no longer updated, but last version, 1.3.5, released in September 2008, can be still downloaded from the official website. "It is true, RocketDock has been discontinued. [...] The app remains available on https://rocketdock.com, but is unsupported."
RocketDock vs TypeAndRun opinions
typeandrun is more of a customizable command line or console alternative used purely with keyboard, while rocketdock is a link/icon launcher
Quicksilver is a fast and free Mac OS X productivity application that gives you the power to control your Mac quickly and elegantly. Quicksilver learns your habits, making your everyday chores simple and efficient.
RecentX is an innovative launcher that gives you instant access to your files, folders, programs, websites & clipboard history. It automatically remembers your favorite & recent items so that you can launch them even faster.
GNOME Do allows you to quickly search for many items present on your desktop or the web, and perform useful actions on those items.
The program seems to be no longer updated. Last version, 0.95.3, released on November 2014, can be still downloaded from Launchpad.
FARR also lets you quickly run web searches, send email, manipulate files, control on-screen windows, and much more. Build and share custom commands or install plugins to add tons of new features, like live search features for your clipboard history and your internet bookmarks;...
SlickRun is a free floating command line utility for Windows. SlickRun gives almost instant access to any program or website. SlickRun allows you to create command aliases (known as MagicWords), so C:\Program Files\Outlook Express\msimn.exe becomes MAIL.