SpringBox 6.0.200.2 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most popular version among the software users is 6.0. SpringBox belongs to Development Tools. This free software is an intellectual property of The Java(tm) Tutorial: Sun Microsystems, Inc. We recommend checking the downloaded files with any free antivirus.
From the developer:
Spring layouts do their job by defining directional relationships, or constraints, between the edges of components. For example, you might define that the left edge of one component is a fixed distance (5 pixels, say) from the right edge of another component.
In a SpringLayout, the position of each edge is dependent on the position of just one other edge.
You may want to check out more software, such as GnuWin32: PlotUtils, FarPy GUIE or Menu Creator 2007 & Menu Extended, which might be similar to SpringBox.