Extraordinarily powerful time and project management program (including calendaring), with stellar time-tracking. Developer very responsive, and the program is actively developed. The program has so many features and is so configurable that it can take a while to master them all, although mastering the basic functions is easy.
Worktime Studio (WTS) is a truly remarkable time- and project-management program. In addition to task and project management, WTS provides stellar time-tracking capabilities and powerful calendaring options. All of these functions are seamlessly integrated, so you can track projects you're working on during the present while scheduling future projects in the calendar (inter alia). A remarkably wide variety of reports, filters, and prioritizing options is also available, so you can control your tasks and projects instead of having them control you.
Both the power and configurability of Worktime Studio are staggering, and the interface is beautiful. The developer is also very responsive to user suggestions, and I have already seen such suggestions make their way into newer versions of the program. In short - highly recommended!
The new event feature (which, actually, I was planning to suggest that you introduce - you must have read my mind!) is really terrific! Kudos! It's amazing how I am constantly discovering new features which I wasn't aware of previously!