I am building a project resource planning system. It will basically allow
Project managers to allocate resources\people to certain projects and the
main benefit will be the ability to look at a calendar and see where
resources and under or over utilised.

Does anyone have any suggestions for some good controls I could use? I cant
really find a decent calendar type control that will allow "mouse over" pop
ups etc.

Or anyone recommend a system I can look at and get some ideas from?

thanks