Right, it's more clear now. As mentioned, Gantt chart functionality is being worked on. As for the rest, I feel that your use-case could indeed be expressed in YOTEY. Especially diagram items have deliberately free interpretation to model various, potentially abstract, entities and their relations. Thank you for the thoughts.
I think I might understand better what you mean: representing risks as tasks and placing them in a Gantt chart? This is an interesting idea. A pattern I employ is representing risks as items (those rectangles in the plan diagram) and mitigations or alternative approaches as other items. Sometimes both "pointing" to one element which represents a goal or similar, there are many variations possible. Very interested in your interpretation.
There is Gantt chart functionality but it is not ready yet and is not activated. In its current form it is meant (as one might expect) for scheduling tasks within a plan on different time scales. The connection to risk management is not very clear to me, but sounds interesting. Could you elaborate?
I have been working on YOTEY: a different take on (technical) project management. The idea is to put emphasis on expressing actual components, modules, complete products, goals, risks, etc. and corresponding concrete tasks in an easy to share, discuss and present "plan", visually. This is in contrast to issue-oriented thinking which seems to have become the conventional idea.
Take a look at the web-site for some more background info. It's still early days, but the first Beta is available.