2DFlow® for Windows® is a program for visualizing flows induced by the distributions of Point and Line Singularities such as Vortices, Dipoles and Sources. It graphically illustrates the use of potential flow theory by the combination of a uniform flow with a variety of singularities to simulate a wide range of fluid mechanic problems. Designed for professional and educational use, program quickly produces graphic representations of many classical fluid dynamics problems helping comprehension. When used in conjunction with a fluid dynamics class, it can make visualization of textbook theory as easy as clicking the mouse. It also allows the user to simulate and visualize complex flows, making it a valuable tool for the professional.