Versionner is a French word that means handling versions.
Versionner is the GUI of metacello. It supports a very simple working style: Pressing commit save all the packages of your application and it will create a new Metacello version. The goal of Versionner, is to not ever write a Metacello baseline or version by hand. A nice GUI, as it should be.
Found us in squeak source 3
(Smalltalk at: #ConfigurationOfVersionner) perform: #load