Trinity Desktop Environment
The Trinity Desktop Environment (TDE) is a complete software desktop environment designed for Linux and Unix-like operating systems, intended for computer users preferring a traditional desktop model, and is free/libre software. Born as a fork of KDE 3.5 in 2010, it was originally created by Timothy Pearson, who had coordinated Kubuntu remixes featuring KDE 3.5 after Kubuntu switched to KDE Plasma 4.
Source: Wikipedia — Trinity Desktop Environment (CC BY-SA 4.0)