QCad is a powerful but easy to use 2D CAD program for Linux, Windows, and Mac OS X. It uses DXF as its standard file format. While other CAD packages are often rather complicated to use, QCad tries to stay comfortable, and even an absolute beginner can create professional drawings with a minimum of effort.
X-Cart is a PHP shopping cart software used by tens thousands on-line merchants worldwide. It provides a wide range of e-commerce features, flexible "tableless" design, easy text content modification using WYSIWYG tools, W3C XHTML 1.0 compliance, SEO friendly product catalog, Web-based administration, on-line payment gateways support, real-time shipping cost estimation based on product dimensions, inventory management, full multi-language support, and report management. X-Cart has no logical limitations on the number of products and categories in product catalog.