Send User Notifications on macOS from the command-line
terminal-notifier is a command-line tool to send macOS User Notifications, which are available on macOS 10.10 and higher. alerter features were merged in terminal-notifier 1.7. This led to some issues and even more issues in the 1.8 release. From now on terminal-notifier won't have the sticky notification feature nor the actions buttons. If you need them please use alerter. Sticking to two smaller specialized tools will hopefully make them easier to maintain and less error prone. It is...
AppLaunch is a MacOS X tool written in Objective-C/Cocoa to launch common Unix and MacOS commands using a "graphical command line". You can say that it is the MacOS X version of Windows', KDEs, ... "Run"/"Launch" dialog.
WidgetTerm is a terminal Dashboard Widget for Mac OS X 10.4 or above. This widget implements the terminal function through the Web Kit Plug-in in Objective-C powered by iTerm's open source terminal implementation.