"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. How to load Versionner:Gofer new squeaksource: 'Versionner'; package: 'ConfigurationOfVersionner'; load. ((Smalltalk at: #ConfigurationOfVersionner) project version: #development) load.Versionner is known to work on Squeak (thanks Chris Cunningham): (i) Squeak doesn't have a Announcement loaded, and the configuration doesn't require it, either. (ii) ThemeIcons doesn't exist in Squeak - apparently Pharo only (no package on SqueakSource, either). (iii) PluggableIconListMorph also doesn't exist in Squeak. For all that, if you load an Announcements package and blow past the other issues, it does seem to run acceptably.