Cacoo solves this problem because it is a simple and especially easy to use editor that does not need installation and is accessible from any computer.
After creating a free account, you can create all the diagrams you want, organize them into folders and have them accessible from anywhere.
From the editor you can enter almost any shape and link your diagram to the big gallery of clip art you have. Still, you can always introduce your own images.
Creating links or aligning figures makes it easier than ever as you drag or resize any element as it appears. The program has guides that automatically adjust the images to the elements arranged on the diagram.
The appearance of the plot elements can be modified by using the graphic editing panel, which contains text tools, padding, borders, and shadows.
If all this were not enough, Caco also has the ability to edit a diagram with others and share diagrams directly from the web.