Dexed version 0.8.0 is now available and it has just received a GUI overhaul. Dexed is a plugin synth that is closely modeled on the Yamaha DX7. The goal of this synth is to be a tool/companion for the original DX7.
The updated version has just landed in the KXStudio repositories. This includes both LV2 and LinuxVST versions. if you are you using KXStudio and want to try it out, simply update your system and give it a go.