If you are new to Teigha and want to try its features without a login and trial license agreement, you can download Teigha Viewer — a free application that illustrates Teigha features. Download Teigha Viewer from this page. Choose the version that fits your requirements (operating system, etc.).
Teigha PRC is a toolkit for reading, rendering and creating PRC files (also known as 3D PDF). It is included in a standard Teigha subscription. PRC (Product Representation Compact) is a 3D file format that is used to represent 3D model data. The main purpose of the PRC format is to provide a compact binary form for CAD data visualization.