Finally I took the time to arrange and upload my TimelineControl to CodePlex.
The TimelineControl is 100% C# managed code WPF control for visualization of data on a timeline.
It separate behavior from visual aspect, like any other WPF control using Attached Properties to connect your data model properties to properties require by TimelineControl and it inner working classes.
It has support for different arrangement of items, currently there is Gantt items panel and Compact items panel.
It also support connection between data items you visualize so for example you can display dependencies between tasks.
Any suggestions or comments are very welcome.
I hope it will be useful for others.