The IBM Mashup Center's Mashup Builder allows you to quickly drag and drop widgets onto a mashup page, and you can easily align the widgets by simply dragging them. Besides dragging the widget itself, the "Move" and "Resize" featuer allows you to easily make sure that widgets are aligned at the exact locations. For example, the following widgets are almost aligned, but not quite:
Under the Widget's setting, you can open the "Move" command, and specify the exact coordinate that this widget should be located:
Do the same for the other widget, and use the same value for the Top coordinate. Now the widgets are exactly aligned.
Similar methods can be used to align widgets horizontally using Resize + the Move feature.
About the author
Ronald Leung is a Web 2.0 Mashup Solutions Architect in the Information Management division of IBM. He is located at the IBM Silicon Valley Lab in California. You can reach him at firstname.lastname@example.org.