Twproject’s team in its core developer instance (Roberto Bicchierai) has released a free online service for designing “Gantts” online, here:
This editor is a Gantt editor as for functionality, but it actually supports the more extended functionality of Twproject modeling, supporting task state management as distinct from dates management. Supports multi assignments, dependencies, drag&drop, zooming and much more.
Before developing this component we carefully researched the available online Gantt components – a review here:
But in the end our requirements (like being built on jQuery) were not satisfied by any of the linked above, so we built our own.
A coming Twproject update will include the option to import such Gantts in Twproject, and also a built-in version of this complete and flexible editor.