Creately

People don't love drawing diagrams mainly because most diagramming tools are not intuitive and have a high learning curve. And they use different tools to draw different diagrams which is not cost affective.

Web based tool with a very low learning curve. Templates and automation to make it easy to draw diagrams. One tool that support many commong diagram types at a very affordable price.

Anyone who wants to draw diagrams. Prominent users include network engineers, UX designers, software engineers and architects, business analysts and project managers.