OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
Dr.Explain - Dr.Explain software is a help file authoring tool.
WooCommerce - A freely available eCommerce plugin that enables shop facilities on your WordPress website. Functionality enabling extensions & beautiful themes available.
Document360 - Self-service knowledge base software focused on SaaS Products & Enterprise Software Projects.
PrestaShop - Create your online store with PrestaShop's free shopping cart software. Build an ecommerce website for free and start selling online with hundreds of powerful features.
WinCHM - Creating CHM file, Make CHM file, Web Help. WinCHM Pro - Help authoring software (CHM, WebHelp, DOC, PDF) . With this powerful tool you can not only create chm file from scratch, but also convert a set of existing HTML files to a chm file.