I've been looking for a cross-platform app that could visualize measurements from antenna analyzers and VNAs. AE6TY's SimSmith is the best app so far. But, unfortunately, it can't connect to devices to control them directly. It takes only files in Touchstone format to visualize.
Today I've found Wizkers, the very promising platform to become a de-facto interface for many measuring tools. Though it is still missing many useful features. For example, a Smith chart in js/app/lib.
Maybe anyone is already implementing Smith chart? If no one, I have no choice but to start working on it. But I don't think I have enough free time to implement and contribute it in a reasonable amount of time.