1)   DiagramStudio 5.3
Diagram Studio is a tool for creating flowcharts, business and technical diagrams. Draw objects, various shapes and link them together. The program features user-controlled points of connection, color shadows, graphics import and export, curves.

 2)   Diagram Studio 3.2
Diagram Studio is a tool for creating flowcharts, business and technical diagrams. Draw objects, various shapes and link them together. The program features user-controlled points of connection, color shadows, graphics import and export, curves.

 3)   EDGE Diagrammer 6.04.2020
Create flowcharts, network diagrams, design diagrams, and all other block diagram types. Drawing boxes or symbols of many shapes and connect them with lines of various types. Full zoom, OLE, graphics import and export, curves, flow symbols.

 4)   JGo 5.0
Build custom interactive diagrams, network, workflow editors, flowcharts, or software design tools. Includes many predefined kinds of nodes and links. 100% implemented in Java. Requires Java 2. Flexible, extensible. Optional automatic layout.

 5)   AutoProject for AutoCAD 1.0
AutoProject for AutoCAD is a plug-in for AutoCAD 2000, 2000i, 2002 and 2004. This plug-in gives AutoCAD the ability to project 3D entities to 2D entities in the XY plane in the AutoCAD model space.