Roadmap view - annual/qtrly


I am looking for an app or someway or displaying a graphical roadmap on the screen. Think diamonds for delivery, big blocks for activity and stars for go-live (or something similar).

The calendars I have seen are at the detail level - e.g. they look at entering detail at a date level and then displaying this in an outlook type format. I am looking to create something that shows the next 12 months across the top with boxes, diamonds etc underneath this.

This is a bit like a gantt chart but thought I would seek guidance from the community