Creating Gantt-Charts on Linux

Like many unfortunate office/productivity areas, project management, and especially Gantt-Chart production, seems to lean heavily on a single Microsoft product to the point where abstract-seeming work practices are actually derived from technical features and properties of that product.

A couple of years ago I tried to create a Gnatt-Chart on Ubuntu. I initially thought that would be a no-brainer, but it proved to be harder then anticipated.