Elementary started out as a GTK2 theme and icon set created by DanRabbit. As the popularity grew, elementary was going beyond being a theme and a group of developers and designers started working on Elementary OS 1.0 Jupiter, which was initially released April 2011 (using Ubuntu 10.10 as its base). Jupiter used Gnome 2.32 as it’s desktop environment but added a custom theme and icon set, Docky dock and few in-house application like Dexter contacts and Postler email client. They also made modifications to Nautilus file manager.