(Any platforms). The team of developers who released the famous Topcat perf. manager, are still working on their new project, the Professional Flight Planner X. Since their last update, they have re-designed the interface and they are just testing and polishing it.
There are a lot of flight planners already in the market but Judith Blaschegg and Christian Grill will integrate several advanced features : ETOPS/EROPS, NATS and PACOTS, and probably interfacing it with Topcat, if you own it. More soon.
They are targetting a release for this Christmas...
(Updated screenshots at november 30th)
More info on this final project :