The article names Forio as the author of Julia Studio.

http://forio.com/labs/julia-studio/ shows this message:

"Forio has discontinued development & support for Julia Studio."

It still looks like the github project is still up: https://github.com/forio/julia-studio

Forio points to: https://github.com/one-more-minute/Juno-LT for a Julia IDE based on LightTable.

I have used none of these environments...