I am using Corel Draw since many years. One of the great features, I love with their program, is that the guidelines are possible to rotate.
After drawing one from one of the side rulers, you can drag them around via the inherited original direction, it was drawn from (horizontally if drawn from the left side ruler, vertically, if drawn from the top ruler).
When you click on the line, it can be selected (highlighted, etc.). But when you click on it again, if selected, it shows a center point, that can be dragged anywhere, and then you can rotate the guide in any angle around the center.
It can be very useful, when you have to snap very precisely along non vertical or horizontal lines.
Please consider this feature. I am using mac since many years, and the only thing, I am keeping a windows based machine or bootcamp is because of Corel Draw. Right now, this is the only feature, that is missing from other software, and I really would like to channel my workflow to a more simple structure. This feature can be very important, when precision is a must.