Barrel is a system tray tool that allows you to open “Barrels” — groups of applications, configured with text files. It can launch applications, files, websites, powershell scripts, and more.
Barrel is heavily inspired by Brett Terpstra's Bunch, which is sadly MacOS only.
To use Barrel, create a file (eg work.barrel) in the barrels folder and
in it list your applications. You can create as many barrels as you wish.
Click here to see an example .barrel.
Brett Terpstra for the idea
GeorgeUI for the icon