Computers and Structures, Inc. is pleased to announce the release of CSiSections, an indispensable, free engineering tool that conveniently computes the structural properties of cross-sections of more than 25 shapes. CSiSections is an essential tool for engineers who need to access the properties of commonly-used sections with the touch of a finger, and also for students who want to learn about the calculation procedures for structural properties of various sections. Covering flanged, built-up, circular, polygonal and unsymmetrical sections, CSiSections instantaneously displays basic analysis properties such as area, shear areas, moment of inertias, including principal directions and principal inertias, torsional constant and centroidal location. Also included are design properties such as radii of gyration, section modulii, and plastic modulii. CSiSection provides the only platform for quickly evaluating the properties of sections in a free, convenient smartphone application.