The 1.0 version of FlexCAD is available as a free download on our website. The actual developer of the software is PI Integrated Systems. The most popular version of the software is 1.0. FlexCAD lies within Photo & Graphics Tools, more precisely 3D Design.
From the developer:
FlexCAD is a plant layout and piping design tool. Piping design is a profession learned through experience and practiced with professional intuition. Many piping design applications sacrifice desktop productivity with a top-down architecture, which requires the professional piper to be both adept with CAD and be a computer expert as well.
You may want to check out more software, such as 3D Studio VIZ R3, P-CAD 2004 Viewer or Win4D Advance, which might be similar to FlexCAD.