Butler is described as ''s purpose is to make it easier for you to perform different — potentially recurring — tasks. Butler lets you arrange these tasks in its fully customizable configuration. There, you can assign one or more triggers to a task' and is a Application Launcher in the OS & Utilities category. There are more than 25 alternatives to Butler for a variety of platforms, including Windows, Mac, Windows Explorer, Linux and iPhone. The best alternative is Keypirinha, which is free. Other great apps like Butler are Listary (Freemium), Karabiner Elements (Free, Open Source), Quicksilver (Free, Open Source) and Keyboard Maestro (Paid).
Karabiner, previously called KeyRemap4MacBook, is a very powerful keyboard remapper for Mac OS X. In addition to simple key remapping, it has special remapping modes like Emacs-mode, SandS-mode (Space and Shift).
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.
Keyboard Maestro is the leading software for Mac OS X for customizing keyboards. This automation software will increase business productivity just by using simple keystrokes. It is the first choice for all your business efficiency needs.
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.
LaunchBar is a smart and powerful, keyboard driven productivity utility that lets you access and control every aspect of your digital life. Whatever you want to get done on your Mac – with LaunchBar it’s only a few keystrokes away.